Press ctrl+alt+delete (at the same time) - task manager- file - run new task then write explorer.exe then hit enter Ymetal

it may be a graphics driver problem, or hard disk. try opening the laptop in safe mode by pressing (either F2, F8, F10, F12)

Maybe it's Ram problem... clean it and put it in the right way or might be bios problem otherways it's screencable problem

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