It's not the files in system restore that slows it down as much as the system restore function itself.
If you just disable it to clear it out, then re-enable it, you're back to square one once the folder becomes full again and has to start swapping to make room.
Right click "My Computer". Select Properties>System Restore Tab>Turn Off System Restore, then reboot. The system restore folder will be cleared. If you re-enable it again, on the next reboot, it will automatically start creating restore points. No need to create one manually, unless you want to that is.
You will also see a slider for size adjustment.
I dislike the function myself and have it permanently disabled. I keep full system backups, as well as incrimentals, using third party software on various external drives which affords the luxury of deciding when and what I want to backup. I usually do it 3 times a week, just before shutdown. If your main drive fails, (and there's no getting around that) system restore is useless anyway. It will also restore viruses,malware etc. It's basicly too dumb for it's own good.
Edited by HitSquad, 22 October 2008 - 07:04 AM.