I am running Windows Vista 64-bit. My tower fell a couple days ago, and froze up. When I restarted it, I receive the error that ntoskrnl.exe is missing or corrupt. Now when I boot my computer it goes to a selection screen asking what mode I want to run in, but no matter what I choose, I get that error message. I need help trying to find a way to grab data from my hard drive, please help!