I set a single restore point and ran CCleaner again - with The Windows Log Files checked. The restore point was then missing both from CCleaner Tools and from the calendar in System Restore. I set another restore point and then ran CCleaner again but without the Windows Log Files checked. The system restore point was still there. I'm a bit reluctant to try again as I have today installed new anti virus and spyware software so would like to keep the resore points I have set. Incidentally there are several System restore points set since my original post. These are all viewable on the Sytem Resore calendar and from within CCleaner.
I have done a search for the System Volume Information folder - and cannot find it. Incidentally I did find it on my other computer in C:\Documents and Settings\user\My Documents\c_
Bercilak