Hello! I've been having these issues for at least a few months now and tried several methods to fix it, but nothing has helped so far. I am running Windows 7.
I have three main problems that may possibly be related, so I am detailing all three:
1. Whenever I reboot, Windows creates a paging file (usually of about 100mb-200mb) and I have no space left on my C: drive. Therefore I can barely run any programs before they start shutting down (such as Malwarebytes). Even when I delete large files or folders (1gb, etc.), the next time I reboot, I still have no space on my computer.
2. My screen is black and apparently "Build 7601 / This copy of Windows is not genuine". Some tips I found online helped fix it temporarily, but this screen almost always comes back after several reboots.
3. Windows Update has caused my computer to go blue screen of death in the past, and constantly has trouble downloading updates now. I've turned off automatic updates but I'm not sure which update has been causing all the problems since it's been a while since this was an issue.
Thanks so much everyone! Please me know if I can help out with any additional information.