Ok I did a very light version of xp SP3 (140MB ISO), but I can't make it run I removed almost everything, made the ISO and tried to install it on a VM (sun virtualbox). I had a BSOD saying something like "c:\windows\system32\sfcfiles.dll is not a valid windows image blablabla". I googled for the problem and tried to disable the sfc function in the tweaks. it solved my problem, but now I have a new one: http://img507.imageshack.us/img507/7266/errorele8.jpg here is a kind of translation: winlogon.exe - Damaged image The application or DLL c:\windows\system32\sfc_os.dll is not a valid windows image. Please check it with your install disc. As you can see it isn't a standard BSOD. What can I do / What have I done wrong? thank you