Restoring XP from DOS

1. Restart your computer, and then press F8 during the initial startup to
start your computer in Safe Mode with a command prompt.

2. Log on to your computer with an administrator account or with an
account that has administrator credentials.

3. Type the following command at a command prompt, and then press ENTER:
%systemroot%\system32\restore\rstrui.exe

4. Follow the instructions that appear on the screen to restore your
computer to an earlier state.

Good Luck..