Got a laptop problem after running ADD v8. The defrag no longer works properly, and I need some help/advice. Laptop always been well-looked after. Firewall, AVG, ad-aware, spybot, crapcleaner etc. Pretty tidy. Win2000, 20 Gb HDD, 1 partition C:, free space 13Gb. First off, used ATI v9 to image C: into an 11gb image on External Hard Drive back-up location. Also moved all mp3 files from C: to EDD. The partitioning went fine and I went to this config : C: 6gb, free 2gb, % free 33%, holding OS E: 1gb, free 0.5gb, % free 50%, holding data F: 12gb, free 3.3gb, % free 27%, holding mp3 files I then did 3 things: (1) moved my personal folder into E: by right-clicking My Documents in Win Explorer and changing the Target Folder Location. (2) moved my Favourites folder into E:, and also changed reg key 'Favourites' in HKEY_CURRENT_USER/Software/Microsoft/Windows/CurrentVersion/Explorer/userShellFolders. Saw at the same time that 'My Pictures' and 'Personal' had their reg key changed due to (1) above. (3) copied mp3 files from EDD to F: Then imaged C: and E: to my EDD. Messed up here tho, cos due to quota location on my BackUpLocation, the full 11gb image of the original C: was deleted. So that doesn't seem to be available anymore. Then I decided to defrag all 3 partitions, and reimage them. E: and F: defragged fine, but C: will now longer defrag on either of my 2 defrag apps. Never had any prob with defrag before. Win2000 defrag mmc.exe fails everytime with : "dfrgfat.exe : instruction at '0x77fcaff8' referenced memory at '0x00000000'. Memory could not be 'written'." Then says Engine Connection Lost. The error in DrWtson.log says “000005 Access Violation”. defragNT fails with a message : "defragment stopped at users request" I have tried both in Safe Mode. Same problems. chkdsk sometimes shows problems with the file system, sometimes not. Doesn't matter if i run chkdsk / f or Norton Disk Doctor from boot disk. Says errors are cleaned up, but then they eventually reappear (but not immediately on reboot, can't figure out why or when). Have run the HDAT2 application from boot disk, and this seems to show some errors on C: for the file system under BOOT, TABLES and DIR. But Disk Doctor says the file system is generally Ok. Aside from defrag, all seems fine. Just don't know what my next step should be. Do I reverse everything, and unpartition back to my original config? But what if defrag still doesn't work? If u got down here, thanks for reading.