Interesting Reading, thanks to everybody who has replied. My tower is a custom build from a few years ago, although it was in for a complete system rebuild about 6mths ago. Like the gent with the Dell I have found that if I leave the recycle bin unchecked, then all my restore points stay (will monitor for longer to be sure), but if I tick the box then as if by magic they are all gone!!
Not sure what it all means, I also run eraser to shred files, Spysweeper & Norton 360 to keep a "clean" computer, both report no problems, and I find spysweeper very fussy.
Onece again thatnks for everybodys help.
HC