Many problems - redirects, blue screen, dependency group

I assume I picked up some kind of virus, all of a sudden I am having a lot of problems with my laptop. It started with getting the blue screen, which now happens regularly, sometimes even as soon as the computer starts. I am constantly getting redirects and fake virus scan popups. When I try to open my browser, it usually takes a few minutes before it opens. I've been trying to install new programs, mainly the ones that are suggested to get rid of the redirects. Some install properly but some just give me an error that says "the dependency service or group failed to start". I read that ComboFix was good for getting rid of the FakeAV issue but I always get that error when installing. I tried to do the "scannow" command but I can't even run the command prompt as the admin without the dependency group failing to start. I also noticed that certain programs aren't running properly - I tried to use google earth and it doesn't load any data, just gives me a black screen. I've run a full virus scan which turned up nothing except two warnings about files it was unable to scan. I've run trojan scanners and MalwareBytes, which turned up nothing. When I run HijackThis, it gives me a message saying that my system denied access to the hosts file, and then the scan won't complete. I did a system restore to a point before I had any problems, but it didn't help. I saved my logs in case they will help anybody. Thanks in advance.