Hi, Restored laptop (Acer Aspire 5735, OS Windows Vista Home Basic 32 bit) to factory settings a few months ago and noticed that there was a lot of space being used up on C: drive even though I hadn't started installing programs and putting files back on to laptop. Used SpaceSniffer to see where all the space was being used up and it only found the C: drive to have size of 38.1GB even though it should have 69.6GB. Also ran WinDirStat and that also said C: drive had size 38.1GB. Any suggestions on why there seems to be 31.5GB missing? Any help would be greatly appreciated, thanks!