After downloading a program, AVG reported that it blocked an attempted attack and deleted the file. However, I started getting more AVG alerts. I ran Malwarebytes, but it crashed halfway (blue screen of death). When it restarted, I got to just before the login screen and it stopped with only the mouse on the screen. I rebooted into safe mode, and it worked, and ran Malwarebytes and Spybot, both of which removed multiple "threats". I also removed Windows Antivirus 2009 files and registry entries, but I still get browser redirects on Firefox. When I ran AVG, it froze my computer halfway through scanning an iTunes localization file. I ran Malwarebytes and it also froze halfway, though I don't know which file it got stuck on. Sybot, however, found nothing else. I still cannot boot normally, even if I only use services and programs used in safe mode through msconfig. I ran rootrepeal but it also gave me a blue screen, right after clicking "Scan". I ran HijackThis but I don't know if anything will show up because I can only run it in safe mode.