How to Disable or Enable System Restore on Windows XP

This information is provided to disable System Restore on Windows XP to prevent the virus from restoring. System Restore is part of Windows XP. If you need help with System Restore, contact Microsoft technical support.

Note: If you turn off System Restore for troubleshooting purposes such as Virus removal, don't forget to turn it on again again after the removal process.

You must have an Administrator Privilege to be able to disable System Restore on Windows XP.

1. On the Desktop, Right Click on My Computer
2. Select the System Restore Tab
3. Mark the "Turn Off System Restore" to disable and UnMark to Enable
4. Click Apply on the Bottom of the Dialog Box to save the settings.
5. A message "This deletes all existing restore points" will appear, click Yes to disable.
6. Click OK.

Important: If you turn off System Restore, you delete all previous restore points. You must create new restore points once you turn System Restore back on.

source : http://www.precisesecurity.com