I have often done that without getting any problems.Store the boot files (boot.ini, ntldr and ntdetect.com) somewhere before you run the fixmbr command. Thanks for the answer, but I already gave it a go... But alas, when I reboot my PC, that **** message popups again "Disk Read Error"... ...I am now going to install a HD (20 GB) and install Windows XP on it, so I can start backing up stuff (which seems impossible, since I have 480 GB of stuff on my PC). Oh well, if anybody knows a possible solution to my problem, please share it with me... Thanks so far...