Ok, so that means some registry entry could have been altered.
Please type cmd in the search on the taskbar and make sure you select "Run As Administrator" to launch Command Prompt.
Then run the following command and hit enter:
gpupdate /force /boot
Restart the computer and see if it helps. If not, launch Command Prompt in Admin mode again and run the following commands, one at a time. Not all of them will go through completely or value can be found, and that's ok. Once finished, restart the computer again and see if it works.
reg delete "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies" /f
reg delete "HKLM\Software\Microsoft\WindowsSelfHost" /f
reg delete "HKLM\Software\Policies" /f
reg delete "HKLM\Software\WOW6432Node\Microsoft\Policies" /f
reg delete "HKLM\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Policies" /f
reg delete "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware
reg delete "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies" /f
reg delete "HKCU\Software\Microsoft\WindowsSelfHost" /f
reg delete "HKCU\Software\Policies" /f
reg delete "HKLM\Software\Microsoft\Policies" /f