Angels have the Phone Box
That is indeed very odd. Perhaps you could save a list of your installed programs (use Ccleaner, provide list for both systems), and post that here in code boxes, using the # button. I've got to believe that, since your 2 systems are different makes, it may be something of your configuration. Would be happy to take a look.
Have you ever used any anti-telemetry programs on these systems?
Also, FWIW, I have used Ccleaner on the registries of numerous computers for many years, and have never once had a problem. Of course, Ccleaner is the ONLY registry cleaner I would ever use; usually tune-up programs do more harm than good. I think you'll find a lot of agreement with this opinion on the forum.