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Hello, my HD intel 4600 drivers seems not to be working. I have downloaded different types of versin

HP Recommended
Hp pro book 640 G1
Microsoft Windows 10 (64-bit)

Hello, one day I’m using my system, so I left it on over work wifi, and I came to my system just displaying blank. I had to format it,  The default display drivers for it is the Microsoft Basic Display drivers, but it doesn’t allow me change my screen brightness and do other display stuffs, now I tried to download the updated drivers which is intel Hd 4600, my system automatically goes blank. I have to boot the system on safe mood to roll back the drivers to the default drivers. I already tried going to intel site and also hp sites and also used the windows update drivers still the same thing. This doesn’t happen before. Please I need a fix I’m on the edge of losing my Job. I have also tried to update bios too still the same thing 

I also noted that my display drivers vram shows 0mb

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