Various programs that were there but now are not include:
Audacity
Nero
CCleaner
Firefox
Internet Explorer
Windows Media Player
Media Monkey

Some have returned after being updated:
Spywareblaster v4
MP3Tag

The system restore just said that the machine could not be restored to an earlier time and no changes had been made.

If I reveal hidden folders and look in my C/Windows folder there are lots (60+) of $NtUninstal....folders, some with black text, some with blue.
As you say the good thing is that my PC is running fine, and it does seem to link back to the latest CCleaner 2.05.555, although I just ran as I have before!
Thanks for your help.
Clive.