Start up in Safe Mode,select 'Safe Mode with Command Prompt'.
At the prompt copy and paste:
%systemroot%\system32\restore\rstrui.exe
Then press Enter,follow the onscreen instructions.

I don't know how to copy and paste it. When I type the same thing it says path not found

If you have the Microsoft Windows XP install disk try a Repair Install.
Configure your computer to start from the CD-ROM drive.
[Boot into the Bios and set your CD-Rom drive as first boot device].
For more information about how to do this,refer to your computer's documentation or contact your computer manufacturer.
Then insert your Microsoft Windows XP Setup CD,and restart your computer.
When the 'Press any key to boot from CD' message is displayed on screen, press a key.
Press ENTER when you see the message to setup Windows XP now, and then press ENTER displayed on the 'Welcome to Setup' screen.
Do not choose the option to press R to use the Recovery Console.
In the Windows XP Licensing Agreement, press F8 to agree to the license agreement.
Make sure that your current installation of Windows XP is selected in the box, and then press R to repair Windows XP.
Follow the instructions on the screen to complete Setup.

Due to the lack of feedback this topic is now closed.
If you need this topic reopened, please email the moderating team - be sure to include the address of the thread and the name you posted under.