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So my metro applications stopped working, including start button and notifications button. When i try to open one it shows on second then it closes itself. I checked event viewer, and there were a lot of errors, they always appear when i try to open an application. Example when I press start button:

Activation of the app Microsoft.Windows.ShellExperienceHost_cw5n1h2txyewy!App for the Windows.Launch contract failed with error: The app didn't start..

I know what might have caused this error, i done a stupid thing and i used a program Unlocker 1.9.2 and i unlocked Windows folder (That program is used when you want to unlock a file to delete it ) So i don't know what problems i made, is reinstalling windows only solution?

  • I assume you have attempted to restart your computer? What folder did you used this program on specifically? – Ramhound Dec 1 '15 at 22:12
  • look in the eventlog and post the error messages that you see there – magicandre1981 Dec 2 '15 at 5:30
  • @Ramhound i restarted it few times and it still didn't work ( just turned it on and off , not that restart for deleting everything ), and i used that program on windows system folder (C:/windows/ ) and its all subfolders and files. – Warix3 Dec 2 '15 at 14:40
  • @magicandre1981 I already posted the error , here is picture (error when i press start button ) : prntscr.com/99hhsq & prntscr.com/99hhzx – Warix3 Dec 2 '15 at 14:46
  • click on details and post a picture of the details. – magicandre1981 Dec 2 '15 at 17:39
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I fixed it without refreshing windows, first i made myself owner of all folders and files in c:/windows I used command:

takeown /R /F *.*

Then i gave full permissions to All APPLICATION PACKAGES in windows folder used this command:

icacls "c:\windows" /q /c /t /grant "ALL APPLICATION PACKAGES":F

After I done that everything started to work fine.

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