Windows 10: Windows update, PC won't start, stuck in a loop

My PC announced about new update for Windows. I installed it and after restarting the monitor screen remains black. Nothing happens regardless how long I wait. Then, forcing my PC to shut down by pressing power button turns it off. After that pressing power button again, computer turns on but not all the lights, e.g. only half of the RAM sticks got light or some of the fans remain dark or GPU is dark. There seems to be no logic, which part of the PC doesn't turn on. I can force it to off and turn on again, just to have different piece not working. Sometimes after forced turn off, all of the co

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PC stuck in restart loop after latest update

Thank you kindly for your reply zbook. After following steps 6-8 I got this screen. What should I do now?

 

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

 

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!