Here's the situation: Contracted a virus on my PC (Windows 7). When I boot up my computer, it gives me a desktop with just the basic stuff (My Computer, Recycle Bin, etc.), no background, and nothing in the start menu. I tried booting into Safe Mode and installing from a flash drive the free version of Malwarebytes Anti-Malware, but it gives me an extremely generic error: "Access is Denied." It then ends the install. Since then I have installed and run Spyware Bot Search and Destroy and fixed the errors it has found. Now when I try to boot up the computer (not in safe mode) it just gets stuck at the HP loading screen. I'm not so concerned about the failure to boot to regular mode. I feel that if I can run Malwarebytes in safe mode (which still works) then I can fix everything. The only problem is that I can't install the program. I think the virus may have messed with some sort of permissions? Please help me so that I can install Malwarbytes!