BNJ8G-73CR9-8QRDT-G3WW2-KWY93

JN8J2-G6HFP-J9GXH-6KQT6-4M33Q

NV9JH-W278M-HJHJ8-GPYFT-VCC7D VY6TJ-36NQD-VWPCT-27989-7XKHD

QN2M7-VCVJQ-Y36FD-T3PHJ-82M93 TPY4B-CNKP3-8XXK3-H6PGF-YTB93

CNQBC-CYBM6-JJQ24-VWRHJ-YPYDQ YMFPF-YMN7X-PB4DJ-6BJH6-H8P7D

I provide you windows 7 professional product key , windows 7 ultimate serial numbers, windows 7 professional key , windows-7 32-bit serial key free, windows 7 genuine , windows 7 professional 64 bit . You can find it below :

I give you trial product but once you are satisfied and you have enough money , I highly recommend you to buy Windows 7 Professional Product Key to support the developers .

Windows 7 Professional Product Key

windows 7 professional – samsung – GMJQF-JC7VC-76HMH-M4RKY-V4HX6 windows 7 professional – dell – 32KD2-K9CTF-M3DJT-4J3WC-733WD windows 7 professional – acer – YKHFT-KW986-GK4PY-FDWYH-7TP9F windows 7 professional – hp – 74T2M-DKDBC-788W3-H689G-6P6GT

Other Windows 7 Professional Product Key ( 32 bit )

24437-XVJQQ-F36R3-7HM2B-RXTCX

27CJD-K74PH-TCGV9-WT67C-QM4RC

2666Q-HGXKH-DFP6M-7YGBB-BG7Q7

24PK4-2T3GH-H6GQ2-RM3HW-VCF9M

237XB-GDJ7B-MV8MH-98QJM-24367

26QH2-B4V28-CWVMD-38GXQ-WHFYH

28XCG-9994G-BVHDC-GRF4X-7YXPX

Other Windows 7 Professional Product Key ( 64 bit )

2QGXM-V9W9W-6Q7MR-64C4X-R26CV

2RGBP-GKB4B-BGF4Y-8H6XF-WWPJD

2KH22-2H9QT-YG6WX-8X6Q8-Y89K4

2QT68-76R4B-JF7T9-WXBWF-XJ7KM

Windows 8.1 Update and Windows RT 8.1 Update (also known as KB 2919355) include improvements that make your favorite apps and settings easier to find and use, provide more familiar mouse and keyboard options, and update security and performance. Here’s what you need to know about installing this important update.

Check to see if it’s already installed

If you’re running Windows 8.1 or Windows RT 8.1 and you get updates automatically, you don’t need to do anything; Windows Update will download and install the update for you within the next few weeks. It won’t interrupt what you’re doing except to tell you that you need to restart your PC to finish the installation.

To check if the update is already installed, go to the Start screen. If you see a Search button near your account name at the top of the Start screen, you already have the update.

Note If you’re connected to the Internet over a metered connection, you might not get the update until you switch to a non-metered connection and then check manually for updates.

Install the update manually

If you’re running Windows 8.1 or Windows RT 8.1 and you don’t have the update yet, you can manually check for and install the update by following these steps:

Make sure your PC is plugged in and connected to the Internet using a non-metered connection. Don’t disconnect, unplug, or turn off your PC while the update is being installed. Swipe in from the right edge of the screen, tap Settings, and then tap Change PC settings. (If you're using a mouse, point to the lower-right corner of the screen, move the mouse pointer up, click Settings, and then click Change PC settings.) Tap or click Update and recovery, and then tap or click Windows Update. Tap or click Check now. If updates are found, tap or click View details. In the list of updates, select the update containing KB 2919355, and then tap or click Install.

Windows 8.1 and Windows RT 8.1 build on Windows 8 and Windows RT to bring you enhancements in personalization, search, apps, the Windows Store, and cloud connectivity and has the security and reliability features you expect from Windows.

If your PC is currently running Windows 8 or Windows RT, it's free to update to Windows 8.1 or Windows RT 8.1. And unlike previous updates to Windows, you'll get this update from the Windows Store.

Before you begin

The system requirements for Windows 8.1 and Windows RT 8.1 are nearly the same as the requirements for Windows 8—if your PC is already running Windows 8 (or Windows RT), in most cases, you can get the free update to Windows 8.1 (or Windows RT 8.1).

Before you begin, here are some things to keep in mind. Your files, desktop apps, user accounts, and settings come with you. Windows 8.1 and Windows RT 8.1 come with some new built-in apps and will update or replace some of your existing built-in apps. Your existing Windows Store apps don't come with you, but once the update is complete, you can reinstall all of these apps at once—or just the ones you want. We'll check your desktop apps and devices for you. As part of the update, we check your current desktop apps and connected devices. We'll let you know what you'll need to do to get them ready for the update or to get them working again after the update. In most cases, you won't need to do anything—most desktop apps, devices (like printers), and network connections will work normally after the update. Consider using a Microsoft account to sign in to your PC. If you already use a Microsoft account to sign in to Windows 8 or Windows RT, you’ll use that same account to sign in to Windows 8.1 or Windows RT 8.1. If you don’t, we recommend that you start using a Microsoft account in Windows 8.1 or Windows RT 8.1. If you already have an account you use with Outlook.com, Xbox LIVE, Windows Phone, or Skype, then you already have a Microsoft account. You can keep working while the update is installing. Download and installation times vary from about 30 minutes to several hours, depending on your Internet connection speed and the speed and configuration of your PC, but you can still use your PC while the update is installing in the background. During this time, make sure to save your work and close any apps you have open before leaving your PC unattended in case your PC needs to restart automatically while you’re away. After it restarts, you won't be able to use your PC for a little while (from about 20 minutes to an hour) while the updates are being applied. After that phase is complete, we'll walk you through choosing a few basic settings and then Windows will finish applying any final updates that are needed. Prepare your PC

There are a few things you should do before you start installing: Back up your files. Although your files and apps come with you when you update to Windows 8.1 or Windows RT 8.1, it's a good idea to back up your important files to an external drive or the cloud. Make sure you have enough free disk space. If you're currently running Windows 8, you need 3,000 MB of available space to install the 32-bit version of Windows 8.1 and 3,850 MB of available space to install the 64-bit version of Windows 8.1. On a Windows RT device, you need 2,250 MB of available disk space to install Windows RT 8.1. Plug in your laptop or tablet. It's important to keep your PC plugged in throughout the update process, because if you lose power before it's done, the update might not install properly. Connect to the Internet. It's best to stay connected until the update is done. If you don't, you’ll need to connect again to finish setting up later and setup will take longer. Get the latest critical and important updates. There are some updates you might need before you can install Windows 8.1. In most cases, the latest updates will be installed automatically using Windows Update. But if you don’t have automatic updates turned on and you need to check for updates manually, or if you'd like to check to see when the latest updates were installed, you can do this from Windows Update. Temporarily turn off your antivirus program. Some antivirus software might interfere with the installation. After you install Windows 8.1 or Windows RT 8.1, remember to turn your antivirus program back on. Get the free update

You can download the free update from the Windows Store. Go to the Start screen, and select the Store tile. In the Store, select the Windows 8.1 or Windows RT 8.1 update and then select Download. The update will download and install in the background while you use your PC to do other things. The installer will check to make sure you have enough disk space, that your apps and devices will work with Windows 8.1 or Windows RT 8.1, and that you have all the required updates.

Method 1: Change the Windows 8 Product key using GUI & Activate Windows 8.

How to change (re-Enter) the Windows 8 Product key using GUI.

1. Close all open programs.

2. Right-click at the screen’s bottom-left corner and from the pop-up menu, choose “Run”. 3. Inside the “Run” command box type: slui 3 & press “OK” 4. Type your valid product key and then press “Activate”. 5. Wait until your Windows 8 copy is successfully activated. Method 2: Change the Windows 8 Product key using Command Prompt & Activate Windows 8.

How to change (re-Enter) the Windows 8 Product key using Command Prompt.

1. Close all open programs.

2. Right-click at the screen’s bottom-left corner and from the pop-up menu, choose “Command Prompt (Admin).”

3. Press “Yes” to UAC warning if asked. 4a. Inside command prompt window type the following command and press “Enter”

slmgr.vbs -ipk xxxx-xxxx-xxxx-xxxx-xxxx

(Where “xxxx-xxxx-xxxx-xxxx-xxxx” is your own valid product key) 4b. Now it’s time to activate Windows 8. Type the following command and press “Enter”

slmgr.vbs /ato

5. Wait until your Windows 8 copy is successfully activated.

Here some of Windows 8 Pro Key : 

DWV49-3GN3Q-4XMT7-QR9FQ-KKT67

N4WY8-DVW92-GM8WF-CG872-HH3G7

J6FW2-HQNPJ-HBB6H-K9VTY-2PKT7

MMRNH-BMB4F-87JR9-D72RY-MY2KV

76NDP-PD4JT-6Q4JV-HCDKT-P7F9V

YY8FN-22WHK-MVQKP-PDX29-P34DH

FNV82-RR446-JC3R9-6C4WC-D6667

J2HNC-BGC8H-4CY69-K3784-84YQH

RB29C-D6NRY-BYVG3-HQ6TP-7CBQH

N9DCG-TBM98-R2GGF-6B6GF-QGJXV

Your newly purchased computer or the one you just built has Windows 8 installed. You now want to install Windows 7 as a second operating system thus creating a Dual Boot computer and giving you the best of both worlds and full app compatibility as some of your Windows 7 applications may not be supported in a Windows 8 environment.

Considerations before you start: A) If you purchased your Windows 8 computer: 1 - Installing Windows 7 may void your warrantee. Call the PC manufacture and ask 2 - Installing Windows 7 may render your Windows 8 “Recovery Partition” useless. Before you start, contact the PC manufacture and obtain the “Recovery media” for Windows 8. Also ask the manufacture’s support team about activation when using recovery media as your new computer may no longer have a product key code sticker, Windows 8 uses a BIOS imbedded product key for activation. Partition arrangements on a computer purchased with Windows 8 may vary from manufacture to manufacture. For example a Dell computer could typically have a large number of predefined partitions: EFI System Partition - 500 MB OEM Partition - 40 MB Recovery Partition - 500 MB Recovery Partition - 10.63 GB Boot, Page File, Crash Dump, Primary Partition 919.74 (Windows 8 OS C:) New computers come with a feature called “Secure Boot”. You may need to temporarily disable secure boot in the BIOS before you can install Windows 7. Check your owner’s manual or contact your PC manufacture’s support team for help on how to do this. 3 - Are there Windows 7 device drivers for your computer’s make and model available from the manufacture’s driver support download web site? If there are no Windows 7 device drivers then installing Windows 7 may be a waste of time as your Display, Touch pad, Camera, USB and other devices may not function properly.

B) If you have built your own computer: 1) Verify there Windows 7 device drivers for your motherboard’s make and model available from the manufacture’s driver support download site. There is a good chance there are Windows 7 drivers and in fact less of a chance there are a full set Windows 8 drivers for older motherboards. More recently released boards will support XP, Vista, Windows 7 and Windows 8. The assumption however is that you already have Windows 8 installed as your first operating system on the disk drive.

Conceptual overview: 1) This article is based on a home built computer using a 1TB hard drive. 2) The free version of EaseUS Todo Backup will be used to create an image backup of the drive to an external USB drive before starting. Todo supports both Windows 7 and Windows 8. 3) You need to shrink the Windows 8 partition to make room for a Windows 7 partition. For this task you will use Windows 8’s ‘Disk Management’. To access Disk Management, open the ‘Desktop’ and press the Windows key + X, then select ‘Disk Management’. 4) You will need to disable Windows 8’s ‘Fast Startup’ option before you install Windows 7.

Why disable ‘Fast Startup’: Failure to disable the fast startup option can result in ‘Check Disk’ (chkdsk) running when installing Windows 7. You may also no longer see the dual boot menu the next time you turn on your computer. Also if you have more than 1 disk drive chkdsk will run each time you shut down from within Windows 8 and then boot to Windows 7. Fast Startup in Windows 8 is designed to close and reopen by fast booting (Hybrid Boot), it has left your system in a partially hibernated state, with the drive mounted and according to Microsoft "effectively saving the system state and memory contents to a file on disk (hiberfil.sys) and then reading that back in on resume and restoring contents back to memory." Turning off the “fast startup/hybrid boot” option fixes the chkdsk problem during the installation of Windows 7, the missing boot menu problem (more on this later) and the multiple disk drives “Dirty bit” issue when booting to Windows 7.Windows 8 may take little longer to boot but not all that much as to be meaningful. Boot times for Windows 7 are unaffected and the boot menu will be displayed each time you turn on or reboot the computer.

If you receive error "0xC004F061" when trying to activate Windows 7, it means you're using a product key for an upgrade version of Windows 7 and a previous version of Windows wasn't on your computer when Windows 7 was installed. To install an upgrade version of Windows 7, Windows Vista or Windows XP must be installed on your computer.

If you formatted the drive before starting the installation process, you won't be able to use the upgrade product key to activate Windows 7. To activate Windows 7, you'll need to install your previous version of Windows, and then reinstall Windows 7. For help with the activation process, go to the Microsoft Support website.

We recommend that you install Windows 7 with your current version of Windows running. If you want to format the hard drive, and you are using an upgrade version of Windows 7, you'll need to start your computer using the Windows 7 upgrade DVD, click Custom (advanced), and then click Drive options (advanced).

Windows 7 ultimate activation key here: KH2J9-PC326-T44D4-39H6V-TVPBY TFP9Y-VCY3P-VVH3T-8XXCC-MF4YK 236TW-X778T-8MV9F-937GT-QVKBB

How to activate windows 7? Read here page.

A product key is a 25-character code used to activate Windows. It looks like this:

PRODUCT KEY: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX The location of your product key depends on how you got your copy of Windows:

From an authorized retailer. The product key should be on a label or card inside the box that Windows came in.

A new PC running Windows. The product key will be pre–installed on your PC, included with the packaging the PC came in, or included on the Certificate of Authenticity (COA) attached to the PC.

A digital copy from a Microsoft website. The product key will be in the confirmation email you received after buying it. Or it may be distributed as a digital license if you bought Windows 10, in which case you won't receive a product key.

Free upgrade to Windows 10. If you upgraded to Windows 10 for free from Windows 7 or Windows 8.1, you'll have a digital license instead of a product key.

　Windows 7 SP1 Ultimate Activation Key：

　V8B6B-VH9C8-64Q34-PWQGQ-96FC8

　Win 7 Ultimate 64 Code：

　KH2J9-PC326-T44D4-39H6V-TVPBY

　TFP9Y-VCY3P-VVH3T-8XXCC-MF4YK

　236TW-X778T-8MV9F-937GT-QVKBB

　87VT2-FY2XW-F7K39-W3T8R-XMFGF

　J783Y-JKQWR-677Q8-KCXTF-BHWGC

　C4M9W-WPRDG-QBB3F-VM9K8-KDQ9Y

　Win7 Ultimate 32 Code：

　TG664-TJ7YK-2VY3K-4YFY6-BCXF4

　MVG64-RQDVY-KB9RM-MX9WT-MW824

　TDTY2-6HJ49-46PCK-6HY88-KQXXX

　FKDJ2-RCXKD-TFW4H-2PTGK-MMMH8

　H67R8-4HCH4-WGVKX-GV888-8D79B

Hope you’ve got a picture about what “this copy of windows is not genuine” error actually. Here we’ve arrived with the core part to fix this genuine error. It will work either you’ve Windows 32 /64-bit version, all you need to do is execute this process as mentioned below.

Step 1:

Go to start menu and search for CMD then you need to run the Command Prompt as administrator. In Windows 8 or later go press Windows Key + S, then enter CMD in the search box and right click on the Command prompt and run it as Administrator. If you’ve administrator access you can to go to the start menu or you can simply Press Win + R keys to open the Run program. Then enter CMD and press enter.

Step 2:

Once you’ve opened the Command prompt with the administrator privatization, then you need to SLMGR -REARM and press enter. then you’ll get a successful message about to restart your computer. Well guys, this command was not working on some Windows 7 versions so you can try this command: SLMGR /REARM.

Step 3: Then you need to restart your computer to remove windows is not genuine error from your windows computer. If you followed these steps you can easily remove this error in your computer. make sure you’ve followed the steps correctly without skipping them. Enjoy the error-free computer.

Is this error still remain unfixed? Are you getting any of below error?

1. Error 1: This maximum allowed number of rearms has been exceeded. Well, then let’s discuss how to fix this error.

Open Run from Start menu or press Windows button + R. Now type: regedit.exe Follow this path now: HKEY_LOCAL_MACHINE -> Software -> Microsoft -> WindowsNT -> Current version -> SoftwareProtectionPlatform. Now, look for SkipRearm and click on modify, then change it’s value data from 0 to 1. Restart your computer now. Now, follow above steps carefully again and this error should be fixed this time. Let’s discuss second case if you haven’t got that above error.

2. Error 2: SLGMR is not recognized as an internal or external command. Well, there are multiple reasons due to which this error generally occurs.

First Reason: Make sure you have pasted SLMGR -REARM command correctly. (Note that there is space betweeb dash and R).

Second Reason: Make sure you have opened Command prompt in Administrator mode. (if not, then from start menu look for Command Prompt, Right click on it and click on Run as Administrator).

Third Reason: There might be any problem with slmgr.vbs file. To fix this error, Open My Computer and Open C Drive now. Click on Windows folder, look for system32 folder and open it. Now, look for slmgr.vbs.REMOVEWAT (Or any extension of slmgr.vbs file). Just, rename this file to slmgr.vbs.

This is very annoying when you get an error like “This Copy of Windows is not genuine” on Windows 7, this is because either you are not running genuine copy of Windows or your license got expired, there is also chance that a windows update can cause this problem,  in all these three cases you get error at the computer startup that Windows is not genuine, and also computer background changed to black screen. If you have tried entering CD Key again and again or used any software / Patch to crack windows activation but still you gets error like Windows 7 not genuine or, this copy of windows is not genuine build 7600 / 7601, finally you had no luck then this tutorial is for you.

Please note that this is just an educational tutorial for the people who bought original windows and still getting this kind of error or people who want to buy windows but are not able to buy at this point of time.

We highly recommend you to buy genuine windows and do not support any kind of piracy.

Steps To Fix ” This copy of Windows is not genuine” Error.

Step.1  Go to Start menu and search for cmd, you will get cmd.exe in search result here do a Right Click on cmd.exe and click on Run as Administrator, and you will get Command Prompt.

Step 2. Once the command prompt is opened now type the following command, SLMGR -REARM , make sure you type the same command without any mistake, and also ensure that command prompt is opened in administrator mode otherwise it will not work.

Step 3. Once you typed the above command in command prompt window then hit Enter button on your keyboard to execute the above command.

Step 4. After you hit enter a confirmation window will appear with the details of command execution as.

Most of the time, a Windows 7 clean install means to remove an existing operating system (like Windows XP, Linux, Windows 7, Windows 10, Windows 8, ... doesn't matter) and replace it with a fresh or "clean" installation of Windows 7.

In other words, it's the "erase everything and start from scratch" process for Windows 7, a procedure referred to as a "clean install" or sometimes as a "custom install." It's the ultimate "reinstall Windows 7" process.

A clean install is often the best way to solve very serious Windows 7 problems, like a virus infection you can't get rid of completely or maybe some kind of Windows issues that you can't seem to solve with normal troubleshooting.

Performing a clean install of Windows 7 is usually a better idea than upgrading from older version of Windows as well. Since a clean install is a true start over from scratch, you don't risk inheriting any buggy situations from your previous installation.

To be 100% clear, this is the right procedure to follow if:

you want to erase whatever you have have and install Windows 7 you want to reinstall Windows 7 you want to install windows 7 on a new hard drive This guide is broken into a total of 34 steps and will walk you through every part of the Windows 7 clean install process. Let's get started...

Backup & Locate Your Product Key

The most important thing to realize before performing a clean install of Windows 7 is that all of the information on the drive that your current operating system is installed on (probably your C: drive) will be destroyed during this process.

That means that if there's anything you want to keep you should back it up to a disc or another drive prior to beginning this process.

You should also locate the Windows 7 product key, a 25-digit alphanumeric code unique to your copy of Windows 7. If you can't locate it, there is a fairly easy way to find the Windows 7 product key code from your existing Windows 7 installation, but this must be done before you reinstall Windows 7.

Note: If Windows originally came preinstalled on your computer (i.e. you did not install it yourself), your product key is probably located on a sticker attached to the side, back, or bottom of your computer's case. This is the product key you should use when installing Windows 7.

Start the Windows 7 Clean Install Process

When you're absolutely sure sure that everything from your computer that you want to keep is backed up, proceed to the next step. Keep in mind that once you delete all of the information from this drive (as we'll do in a future step), the action is not reversible!

Note: The steps and screen shots shown in these 34 steps refer specifically to Windows 7 Ultimate edition but will also serve perfectly well as a guide to reinstalling any Windows 7 edition you may have including Windows 7 Professional or Windows 7 Home Premium.

Important: Microsoft has changed the clean install process for every new Windows release. If you're using Windows 10, 8, Vista, etc., see How Do I Perform a Clean Installation of Windows? for links to specific instructions for your version of windows.

Activate windows 7 Click here: http://bit.ly/1Nn9uMQ Enter the product key to activator. 100% genuine. 

Windows 7 Ultimate key: 236TW-X778T-8MV9F-937GT-QVKBB

Windows 7 Professional key: HWRFF-2FFYX-XFXP2-DYFC3-BX3B7

Windows 7 Home Premium: P4DBR-8YPT6-KHRB8-6T7RW-GMXGV

Windows 7 Ultimate Sp1: RHTBY-VWY6D-QJRJ9-JGQ3X-Q2289

Windows7 SP1 Home Premium: PVWMY-TJ7FH-Q6G8Y-JXW9F-V8RR7

A surefire way to get going with Windows 7 is to download the Windows 7 Upgrade Advisor. This scans your system for compatibility, addresses the problems encountered, if so, and suggests what you ought to do before you upgrade to Windows 7.

Another reason why you would want to get a good Windows 7 hard drive is because of Windows 7 gaming. Windows 7 gaming relies on the SATA interface to run the latest games smoothly. You can play Windows 7 games with an IDE interface hard drive, but you will definitely get some choppiness in some games. This is because the maximum transfer rate is too low for the hard drive to reach the maximum transfer rate available.

Every great processor requires a decent amount of ram (memory) to function to its best. As we are considering building a computer to meet today's requirements the amount of RAM should be truly higher. Earlier, 256MB or 512MB memory was considered to be enough while now it is recommended to install at least 4GB of memory. To run Windows Seven operating system and other resource hungry applications it is quite satisfactory. For Windows XP support or for windows 7 upgrade, you can talk to a computer repair company.

If you are looking for the Windows 7 software, internet could be the best option for you to find the best price. As the number of Windows 7 users are increasing day by day, Microsoft is offering different types of deals and discounts on their products. When you are searching for the special offers on the internet, you will be able to find many websites, which are offering it to you. You should also be aware of the scams happening on the net. There are also some unauthorized sites, which are offering fake products for the customers.

For upgrading your computer to Windows7, it is recommended by Microsoft that you go for a custom installation. However as programs will not be preserved, you will need to reinstall the programs you will use once installation is complete.

You can maintain your distribution lists in Contacts in Microsoft Outlook through categories and grouping or filters. However, since Outlook support distribution lists in contacts folders, this reason has become less important.

The T6500 came with a 15.5 inch widescreen display. It is perfect for watching movies and I guess the blu-ray player, CD and DVD read write component will utilize the widescreen to its capacity. Why with a new 55 inch hi-def VIZIO TV she wants to watch movies on a 15 inch screen is anyone's guess, but hey, I am just the husband!

If someone need to activate windows 7 can got free key here,Some maybe invalid,then you can click  http://bit.ly/1IF3UnP Win 7 Home Premium Activation Key As Follows:

PPBK3-M92CH-MRR9X-34Y9P-7CH2F    

Q8JXJ-8HDJR-X4PXM-PW99R-KTJ3H

8489X-THF3D-BDJQR-D27PH-PJ3HC       

TWF78-W7H8T-KXD8C-YDFCQ-HK4WG

Win 7 Professional Edition Activation Key As Follows:

HWRFF-2FFYX-XFXP2-DYFC3-BX3B7

YT9K9-4R938-3TVXX-3Q3QT-9HBXM

C3X7Y-R6WWH-BRXRD-FY84C-FXWHK

XJBR4-M42Q4-QPJ9C-BRDRJ-KHPVY Win7 Ultimate Activation key As Follows:

236TW-X778T-8MV9F-937GT-QVKBB  

87VT2-FY2XW-F7K39-W3T8R-XMFGF

KH2J9-PC326-T44D4-39H6V-TVPBY     

TFP9Y-VCY3P-VVH3T-8XXCC-MF4YK