System Restore is one of the most useful tools available in Windows XP, which can help you restore the computer to an earlier state, when a problem occurs in your computer. There are situations where you are required to reinstall System Restore in order to restore its functionality. This video explains how to reinstall System Restore using the INF file.
Alternately, you can reinstall System Restore using the following command line:
rundll32.exe advpack.dll,LaunchINFSection %Windir%Infsr.inf