Thanks for the response. I have already emptied the recycle bin and Temp folder (I even searched the drive for all files but found nothing untoward). I have since loaded and tried Window Washer and the cold boot (unplugged the PC for ten minutes) but I could not detect any improvement. It is Ghost 9.0, but this does not explain why the C drive is now full (272 Mb free). The IDE has 2.68 GB free.