Are you unable to open the Apps after upgrade to Windows 10? Are you unable to open Windows Store page after upgrade to Windows 10? Do the apps and Windows Store crash whenever you try to open the same?
Here is the solution:
Reset the system.
When you reset the system all your existing apps will be removed but the files and folders will remain intact.
The system will also save a copy on the desktop (in html format) containing details of the apps that were removed following reset.
Warning: You may not be able to go back to Windows 7 after one month of upgradation to Windows 10 or after resetting the system.