BLACK SCREEN AFTER WINDOWS LOADING SCREEN

[marcus_anon]

so instead of buying all new parts i had reused my case and psu from an old dell workstation. not the best call, but you gotta do what you gotta do when money's tight. So im running an apu athlon 200ge, 8gb dual channel memory, 250gb ssd and a 480 psu. Note* while building this thing the power button on the case didnt work, so i had to bypass the switch with a screwdriver everytime*. Installed windows then updated it, noticed it didnt boot up after the update. took out a stick of ram to let it run single channel. BAM, started up, all nice and updated, downloaded the drivers and life was great. Restarted it to put it into xmp, then shut it down to reinstall the second stick. Windows still didnt boot. So I was ready to give up and run 4gb single memory. I wanted to test the one stick of ram if it was faulty so i replaced it with the one that works. tried it, didnt boot, so now i kno its faulty even tho its brand new. so i tossed it aside, put the other ram in but now my screen would go black after windows loading screen. I can still boot to bios, but wont go into windows. PLEASE HELP.