Yes it can be powered on and off. Factory reset and firmware update didnt help. What now?

Factory reset did not help at all.

Yes, it only made it worse. What now?

Making pictures or touching the screen in general while camera or any application using camera is open makes the phone freeze. It needs to be locked-unlocked a few times to unfreeze it. I can't figure out how to fix it!

When I connect powered off phone to the computer it connects for few seconds and then disconnects.
I also can't install drivers because Windows says that there already are installed the latest ones, even though I disabled enforcing drivers with F7 before system startup.
How to deal with this?

I can't update the drivers, Windows says it has already installed the laetst drivers. Even after "Disable enforing drivers" this happens anyway. Help me

I can't install the drivers on Windows 10, it enforces system drivers. Yes, I have followed the tutorial for flaashing new rom and it doesnt NOT work

It didn't help. Now phone freezes everytime I click something on screen in camera application. I still can take photos with physical button though. How to fix it?

When I open Camera application and click anywhere on the screen it completely freezes my phone. Factory reset doesnt help.

When I turn on the camera app it says "Can't connect to the camera". What may be the reason? How to fix it? It sometimes works