This does sound familiar to me.
I have been struggling with a non-functioning update of Nokia PC Suite, software which allows me to backup the contents of my mobile phone on the PC and synchronise it with Outlook. Uninstall didn't work, so I used Nokia's uninstall cleanup tool and, following recommendations on the newsgroups, also used CCleaner to clear out the last vestiges (there are many) of Nokia software from the registry before beginning a clean reinstall of PC Suite. I selected 'fix all issues' and CCleaner carried out 177 repairs. I repeated the scan and clean twice until all was clear.
Well, this worked - in that Nokia PC Suite started to work correctly. But at the same time, I experienced the problems with PC Guard described above. I used the PC Guard diagnostic tool, which found no problems, but asked it to repair the anti-virus function. I then restarted PC Guard and all was well...
BUT Nokia PC Suite is again not working entirely properly.
It's as if there's some conflict between the two - I can have one or the other working, but not both. And CCleaner is doing something that highlights this problem - could it be deleting or changing a setting that is used by both programs?
