How to Start the System Restore tool at a command prompt
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:
4. Follow the instructions that appear on the screen to restore your computer to an earlier state.
For additional information about the Safe mode with a command prompt, click the following article number to view the article in the Microsoft Knowledge Base:
A description of the Safe mode boot options in Windows XP http://support.micro....com/kb/315222/
If you have not got an XP CD then your options are limited as you will need to replace missing files