Hello, my problem started a few days ago I booted up my computer and it kept blue screening. It turns out that It was a registry error that caused the blue screens. So I put in the operating system disk, to fix the problem. Something happened while the process was going on. It blue screened, so I tried to restart the process but it stays on the Windows Boot Manager Screen it says that the application is missing or corrupted. F.Y.I. My computer is a gateway GT5656 with the windows vista operating system any suggestions will help.