Upgraded to 8.1 & now the store App will not work. Has someone come up with a solution yet.
Check you are signed in with a M'soft Account.
Also check Windows for corrupt files.
First try System File Checker
Winkey plus 'X'
Choose Command Prompt (Admin)
Type sfc /scannow
It finds and fixes errors in Windows, but doesn't always report them. Run it and see if the fault disappears after re-booting your system
If corrupt files are found that can’t be fixed, tryDism /Online /Cleanup-Image /RestoreHealth
To view CBS Logfindstr /c:"[SR]" %windir%\logs\cbs\cbs.log >sfcdetails.txt
Search C drive for sfcdetails.txt or navigate to C:\Windows\System32 and scroll down