When I started my computer, I got this on my screen: Explorer This program has performed an illegal operation and will shut down. Explorer caused an invalid page fault in module explorer.exe at 016f:00402349. Nothing happens when I close it. My screen is frozen. The only way I can end this is by Ctrl + Alt + Delete. Then I select shut down. When I try to start in safe mode, I get the same error and have to shut down by Ctrl + Alt + Delete. How do I get my computer unlocked? I really need an detail answer.