1
The BIOS update is unlikely to be linked with the problems you are experiencing, the Windows update semes to have resulted in corruption in the Windows system.
The best first option is too pen the Settings App, go to Windows Update - Update history, scroll to the bottom and choose 'Uninstall Updates' then form that list, uninstall the update that was installed that caused the problems.
2
If that does not resolve the problem.
Open the Settings App.
Go to System - Recovery.
Click the 'Reinstall Now' button in the 'Fix problems with Windows Updates' section and wait for that process to complete.