Well I haven't used vista but it seems like the standard fixes should apply. Have you tried to go in via safe mode? If that doesn't work, can you use an enclosure or another computer to try and get your files from that hard drive? I suspose if the files are really important to you and you have no other alternative you can always take it to a computer repair shop and ask them to get the files for you. Of course you've already thought of this but it sounds like a reinstall may be necessary. Doesn't sound like compressing files if very user friendly on vista. I'll be sure to keep that in mind if I ever use vista. Thanks and sorry for your troubles.