Hello Windows Forum, Windows 8.1 has once again threw the same issue to me for a third time. Most App tiles apppear with an X in the bottom right and fail to launch. I Have tried every researched answer and after boot it's all over again. Things I've tried: Windows app diagnostic troubleshooter, WSreset, Powershell commands found via google(powershell -ExecutionPolicy Unrestricted Add-AppxPackage -DisableDevelopmentMode -Register $Env:SystemRoot\WinStore\AppxManifest.xml), System restore, sync apps via store,( again, after running fixes, it works until reboot, then nevermore) replace backup registry to a time when it did work, Reinstall from scratch( which seems to work for a little while) sfc /scannow, Dism(cleanup and restore) sfc /scannow (again) Chkdsk all responding as fixed 'till boot. What in gods name am i missing? Thank you for your time. Ps.. I tried with all in safemode & as Admin. Computer Specs: HP 110-014 desktop CPU 1.48Ghz Dual 8 GB Ram OEM 8.0 upgraded to 8.1 64bit Screen resolution 1440x900 Pss..Coincidentals... System tray icons hiding,replacing them to visible tray works 'till reboot Cyberfox won't take as default no matter what. Both acting up at same time as app failures.