You can also reduce the size of the system restore file. The oldest onewill be deleted as the file becomes full. Go where you create the manual restore point and click on configure and you can change the size of the file with a slider. I forget the default size. In Vista it was 20% of HD and no simple way to adjust it.
Joe
I can't find more options when using Disk Cleanup feature, is it third party application?Use "Disk Cleanup" and click on the tab "More Options" at the top and click the bottom button there.
I'll keep your advice to using CCleaner, now I'll try to avoid using third party application due to I've so many application.I always use CCleaner to delete Restore Points. It will show you a list of Restore Points you have made and you can select which ones to delete.
I use it to clear out any Restore Points older than 5 days. The beauty is you still have some Restore Points available.
I'm not 100% sure what happens if you make a haphazard or random selection to delete though. Would it effect older restore points?