Hi Folks! After Running Chkdsk on Vista or Windows 7 and results return "Chkdsk found No Errors" it is Worth using a Bootable Utility with the XP version of CheckDisk, Running it from XP Recovery Console on a XP Disc or from XP if you Dual Boot. In short! the XP Disk Check Fixes some file system and Hard disk errors that Vista and Windows 7 seems to fail to detect or rectify. these are just some errors that i remember roughly (mainly errors in the $upper file, MFT Bitmap atributes and Files that appear in the MFT Bitmap but not found...). And yes the XP diskcheck has curred startup, page fault in non paged area, and random crash errors on Vista and Windows 7, this is particularly useful after power off or hard shutdown. I gave Microsoft feedback on this when i tested both systems from beta through to the finished release so i am surprised that it's not been addressed. hope this was helpful.