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This PC can't run windows 8.1 Error : Solution

After the release of windows 8.1 a lot of users when they try to update to Windows 8.1 from Windows 8, they get the following, "Sorry, it looks like this PC can't run Windows 8.1. This might be because the Users or Program Files folder is being redirected to another partition.

so i find a solution that it maybe helpful for you as it helped a lot of other uses :

I got it to install using the hints in this thread and some extra work.I'll go through this step by step and hopefully it will help someone.

1. press win+r and type diskmgmt.msc
2. click on your C: drive 
3. below the list of drives there will be a partition map, the first partition will be Data or some such, listed at 100MB, right click on it and go to change drive letters and paths -> add -> now choose Y: for the drive letter
4. open an admin cmd prompt, in win8 you can press win+x and choose command prompt (admin), in win7 you have to create a shortcut for cmd.exe, then go to compatibility in the shortcut properties, and choose run as admin
5. type: Y: <enter> in the cmd window
6. run these commands:

takeown /f . /r /d y
icacls . /grant administrators:F /t
attrib -h -s -r bootmgr

NOTE: for the icacls command you can use your username instead of administrators, to find out your username type 'whoami'

7. now open explorer (win+e) go to the Y: drive under compuer, go into the Boot folder, and delete all languages other than en-US. Languages are in the form xx-XX. Make sure to shift+delete and not just delete so they don't go to the recycle bin. Empty the recycle bin afterwards just in case.
 8. now go back to the admin command prompt, and type this command:

chkdsk Y: /F /X /sdcleanup /L:5000

this truncates the NTFS log to 5MB, it can be very very big, not leaving enough space for the install
at the end of the output it should tell you that you have at least 50MB of free space on the partition

9. proceed with the windows 8.1 installation
10. once booted into 8.1 and set up, you can go back into diskmgmt.msc and remove the drive letter for the boot partition

Good luck!

Some additional hits.

#1. If you have you Windows 8 to auto start in a standard user account. Bad idea. Set it to require a login, so the system will use it's login to complete the update.
#2. If you have media center and you go to the control pan and turn off your media options. including Media Center, it will still be there. You have the feature and is licensed to your machine, so you can turn it back on. Good idea turn it off before the upgrade.
#3 If you are running  Ceton Corp InfiniTV software, un install it. You would be best to reinstall it after you are sure all is working properly.

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