Windows 10: Acer laptop won't start up after Windows 11 update

Acer Aspire A515-55 won't start up. Get a blank screen, no mouse curser. External monitor same thing. Please help!

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Lumia 830 main camera won`t start

After windows 10 update my lumia 830 camera won`t start . It says Camera won`t start . I tried other camera apps but camera still not work . Front camera working plz help me . I did hard reset , soft reset , downgraded to 8.1 but problem still persist

 

acer tablet /windowes 10 battery won,t charge worked before upgrade. from 8.1?

have Acer Ionia W3-810tablet just installed windowes 10 from 8.1 now battery won,t charge starts to for a few seconds then stops a.Tablet is plugged in still working but. Icon showers totally dead any words of advice Thanks Richard Robinson

 

Windows 10 won´t start any program as Administrator

Hello. I´m having this issue since installed one of the latest Windows 10 system updates.

When I try to open any program that requires Administrator confirmation (that screen with the Yes/No question), this dialog won´t appear anymore. The screen background stays darkened and nothing happens.

1. Using Windows 10 Home (x64)
2. My microsoft user account is properly checked
3. I´m the administrator of the PC
4. Already tried do create another administrator user account - same problem, no success
5. Cannot start any program/service that requires administrator authorization (not even regedit)

Please help!