Hello everybody. I'm new at this forum, and don't know if this topic was discused earlier. The fact is my brother had a computer with one hard disk and 2 partitions (units C and D). In C he had Win 98 an in D had XP. He decided to erase Win 98, so deleted everything under C:\Windows, C:\Program Files, etc. In other words, he left the files in the root of C drive and other directories. Then tried to move all XP files from D to C, and edited BOOT.INI (situated in C) to leave only one boot option. He couldn't find a way to tell the loading process that now it should take windows XP files from C. He believed that it would be done automatically. NOTE: To move system (in use) files he installed a second hd with another XP installed, and boot from it. When he restored the other disk as the default, the system didn't boot, telling something about a missing system file (dll or something like that) Does somebody know how can he get his system running again? Thank you very much for your help. Ace.