When the OS gets badly damaged I use 2 methods to get it working again. Both can be found with these KEYWORDS on google.com
1. XP REPAIR INSTALL
2. XP PARALLEL INSTALL
Sorry to hear about your loss.
hi u all im new to this.so be patient with me i have a dell laptop with an xp professionel os. it i do not know what happen but it seem i that i have no desktop display and i belive its a virus that cause it but no anti virus is detecting it and also explore.exe is not runing and i can not get it to run can u please help me