Hello IRSHADALAM2,
I'm John an Independent Advisor and a Microsoft user like you. I want to apologize if you encountered this issue. I understand you have a problem with apps greyed out. When was the last time the apps was working properly? What is your current Windows version and edition? Press Start then search Settings, select System then About.
Run the System File Checker tool (SFC.exe)
Press WIN+R to open Run then type: cmd
Press CTRL+SHIFT+ENTER to Run as administrator
At the command prompt, type the following command, and then press ENTER:
sfc /scannow
Restore and repair system files
Press WIN+R to open Run then type: cmd
Press CTRL+SHIFT+ENTER to Run as administrator
At the command prompt, type the following command, and then press ENTER:
DISM.exe /Online /Cleanup-image /Restorehealth
Run the troubleshooter: Right-click Taskbar then select Taskbar Settings >On the search box, type Troubleshoot Settings > Troubleshoot, and then from the list select Windows Store apps > Run the troubleshooter
**Reset the Microsoft Store cache
Press the Windows Logo Key + R to open the Run dialog box, type wsreset.exe, and then select OK.
Note
A blank Command Prompt window will open, and after about ten seconds the window will close and Microsoft Store will open automatically.
Re-register Settings app
WIN+X then select Windows Powershell (Admin)
copy paste the command one at a time then press Enter:
Get-AppXPackage -AllUsers |Where-Object {$_.InstallLocation -like "*SystemApps*"} | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
Get-AppXPackage | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
Restart your PC
I hope this helps! Please let me know if you have any further concerns.
Sincerely
John DeV
Independent Advisor