That's a shame! Because my file system appears to be fine after running JKDefrag 3.26 and the author told me that the beginning of the HDD is at the bottom. Also, no error messages from Windows 2000 about corruption, unlike Ultra Defrag, which you need to avoid like the plague! Ultra Defrag, on the other hand, appears to be using a buggy IO driver and yes, Ultra Defrag does appear to make Windows 2000 peed!