David McCauley said:
Windows 10 version 20H....OS build 19042.844

I don't know a lot about this stuff, but I received this notification, (pua.win32 piriform bundler) and took steps to manually remove the potential intruder. But in hindsight, I do have questions about it.
First of all, if it's only a "potentially" unwanted application, in which case would it be wanted? Isn't it intrusive and violating my space? And secondly, if in fact it is one of the bad guys, why won't Windows 10 Defender automatically block its entry?
Any comments are welcome, but please, keep it simple.

I use the portable version of CCleaner to avoid those detections