For a few months I have had the blue screen of death on windows 10: 64 bit. I Remember one morning I tried to turn it on and it wouldn't boot up, despite using it the night before. Diagnostics tests determined everything was fine, but I still do not know how to fix the blue screen. At times, it crashes instantly when I turn it on, and other times I am able to access the desktop for a few minutes. I reverted back to windows 7 and it still came up and then went back to 10 again. I used a clean registry tool and it said it was fine. Numerous messages on the blue screen have appeared such as :unexpected kernel mode trap, kmode exception not handled,and driver verifier iomanager violation. I have tried many solutions and none have worked. I would greatly appreciate any help.