Posted 17 August 2008 - 04:56 PM
Wait what is your asking? System Restore creates restore points, which are hidden in a folder called "System Volume Information" on the root of your system drive. These restore points are actually folders inside System Volume Information, each folder contains versions of system files and data of changes to your system (such as software and hardware installs). If a problem occurs you can revert to a restore point.
If you are worried you have two restores are almost identical you can clear all the restore points leaving the most recent by going to Start (Orb on Vista)->All Programs->Accessories->System Tools->Disk Cleanup.
Vista - On Vista, dialog will open click "Files from all users on this computer", then on following dialog click "OK".
XP - On XP, click "OK" on the dialog that appears.
Now it will start scanning for files that can be cleaned up. When it's done scanning a new window will appear and on the top of that window there will be some tabs, click the tab labeled "More Options". Look for the section that talks about System Restore and click the Clean Up button. Then Click "OK" on the main window. This clears all the restore points except for the most recent and should resolve your duplicate restore point problem.
I do not recommend that you ever delete files or folders in the System Volume Information, as if you need that file and your system crashes you are pretty much screwed.