Hi Shirley,
What application are you trying to remove?
How long ago was the application in question installed?
Did you try uninstalling it via Add/remove programs in Control Panel?
Note, System Restore was not designed to uninstall application.
System Restore does not completely uninstall applications when restoring to a
point prior to the applications installation. What happens is, System Restore
only removes the monitored files for the installed applications and the
remaining files are left behind. Any registry entries made by the installation
of the application will also be gone. This will cause the application not to
function. And in some cases, cause the uninstall and reinstall process of the
partially removed application to fail. This is why it is recommended to
uninstall any applications installed after the restore point you will be
restoring to. If the uninstall and reinstall fail, try to undo the restore
point, uninstall the application in question, then perform the restore again.
The only other option would be to manually remove (for advanced users) leftover
files, folders, shortcuts, and registry entries.