I have just run Registry Mechanic on my XP system. It reported 14 registry errors. I know what these are, and I let them stay (They are "high priority" settings by my firewall update program). I then ran Pit Stop Optimize, which reported 122 registry errors. Strange. I ran this test comparison three times with the same result.
I ran Registry Mechanic again and compacted my Registry. All was perfect and, as I had told it to do, it left the 14 high-priority settings. Then I ran Optimize. Again I got 122 errors reported. Very strange.
I checked out one Optimize comment: that