I was installing GTA 4 when my laptop crashed, I rebooted and everything was fine until I got to where it should say Welcome screen, instead I got a black screen and my mouse only visible and I couldn't do anything. After hours of trying things nothing worked not even System Restore, finally I read a crazy post that told me to keep tapping Shift Keys until Sticky Keys appears and to click yes, oddly enough that did get me into my computer but even when I do that it takes a good 10 - 15 minutes before everything is booted up and not laggy? Can anyone please please help.