Every time I try and back up my files, I get this message. I will then proceed to run every kind of HDD check available to me, as well as chkdsk. However, each test finds nothing wrong. I did have some corrupt files on the NTFS partition that were causing Vista to fail every other boot. I have since removed these files (I did this via Linux). At first, everything fixed itself. Now, Vista is starting to fail to boot occasionally. What could be going on here?