ambiguous, moi ?
Sorry about that. Over the years I have used a few utility suites (system suite 10 for one). Sometimes they broke a few links but mostly were OK. Have got out of the habit now as I have read a number of articles debunking the advantages. Latest issue of UK computer magazine (Computer Buyer or Shopper, whichever still exists) has an article on this and other 'tuning' ploys, general view is don't bother. I have Ccleaner on my machine but don't use it now. It does what it says and seems safe, but as I say the benefit is more satisfaction at tidying up than benefit to machine efficiency.
On another point, yes I clean out all the temporary files under documents and settings and the Windows folder, but manually. I also check out all the registry entries in the run and runonce keys.
Haven't lost all unnecessary habits though, still can't resist messing about with TCPoptimiser.