Hi,
try running an sfc scan first then the dism scan:
File scans
Right click on the Start menu icon and from the revealed list choose 'admin command prompt'. Type:
sfc /scannow
press enter and await results
In the same command prompt and after the above scan has finished type:
dism /online /cleanup-image /restorehealth
Press enter and await results (longer this time).
Or
Try running the troubleshooter from Microsoft. This will reset the Store cache:
Solution Details