I though that I would share this with you. I am about to clone my music system's hard drive. So last night I ran cCleaner, rkill, adwcleaner, anti-malwarebytes pro version and then ran a normal Defender scan. No problems were found by any of those programs. Although I never have done this before I decided to run a full Defender scan and it found a bug in C:\Windows\System32! What! I would have thought that a regular Defender scan would have picked that up. Note that my computer was off-line so the bug, which I forgot to write down (it was way past my bedtime), so it could not have been installed between scans. I guess I will have to run a full Defender scan more often.

That's odd. One would have thought that Defender would not produce a false positive on one of it's own folders.

Thanks for the info on that sir. That reminds me that I forgot to reinstall cCleaner since the last time I reinstalled Windows on my box.