How can if find System Restore in Windows XP folder c:?

However my approach was to find the executable and run it directly "c:\windows\system32\restore\rstrui.exe", where "c:\windows" is your Windows directory  Press the System Restore UI to make it run .

In the UI you can create a new restore point if you like, which will save the current settings (though many installation programs do this automatically if System Restore is enabled), or you can revert to a previous restore point. If you select restore, you'll be presented with a calendar of dates on which restore points are available. If you've just turned on System Restore for the first time, you won't have any, other than the one that was just created.
After you select a restore point to restore too, you're presented with important warnings. It's worth noting that many changes made to your system after that restore point was created will be lost when you restore back to it. But then ... that's often exactly the point of wanting to revert to a previous restore point.