I am advised through Microsoft Update, that updates are available, but only some of the updates will be applied. It seems Microsoft Installer is corrupt or missing I haven't been able to determine which. I have run CHKDSk which didn't note any problems, but my system definitely does have Problems.

I believe the problem was caused by use of an overly aggressive Registry Cleaner, the name of which I can't recall, but I have removed it from my system. Any assistance which could be offered in correcting this problem would be appreciated. I would classify my Computer Savy as Beginner or Novice.