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Thanks for the quick response AlBags
I've been using CCleaner and a Registry Cleaner, they seem to be okay.
However, I have been wondering about something to fix or at least identify corrupted programs which sometimes cause my pc to hangup. For what it was worth, Norton Utilities used to tell me what was broke, but it couldn't fix (but sometimes I did have my doubts)
Or am I just wasting my time searching for the 'Holy Grail', like in the early days of automatic test equipment?
OS