I currently have Spyware Doctor 3.5 with ALL the active protection + live update + auto start-up DISABLED. Basically I just use it as a ON-DEMAND scanner. After installing SD on my pc, I noticed that the program is "locking" my NTFS C:/ drive....preventing me from running scheduled tasks on start-up/reboot (ie CHKDSK, PERFECTDISK offline defrag). I'm getting a "can not open volume for direct access" ERROR message when prompted to reboot for CHKDSK and/or Perfectdisk offline task(s). So I UNINSTALLED Spyware Doctor and this problem went away. I decided to do a re-install just to confirm that this issue is related to SD...and I got the same error again. Anyone know WHY Spyware Doctor is causing this conflict with my NTFS drive and how to correct it? I checked on the author's website regarding this problem and could not find anything. Also tried to email SD's Tech Support, but have yet to receive a response after 2 WEEKS! Any help/info would be greatly appreciated.