Windows 10: I need help, my laptop won’t even start sometimes

It all started last night, I open my laptop and Google and then it goes to a blue screen saying the issue was Ntoskrnl.exe, it would stay on that page doing nothing. I force restart it by clicking power button and then when I turned it up again it would show just a black screen. I kept on turning it off and on until it showed another blue e screen and then said it was restarting but when it finish collecting some error infos it went to the restarting screen but would stop, until 3 restarting symbols popped up and started flickering. It would stay paused consistently so I forced restart myself

:)

 

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

 

Home screen won,t start tried reboot won't start either.

Home screen won,t start tried reboot still won't start?

 

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!