First, thanks for all the messages and for your time looking into this, and profuse apologies for wasting your time if it turns out to be a red herring
I simply assumed that "CC" in the path referred to CCleaner because the 'incident' happened shortly after I had renewed my CCleaner license. A further (on reflection probably incorrect) assumption was that CCleaner had performed an update as part of the license update process, but it just dawned on me that I probably already had the latest CCleaner version installed, in which case there would have been no update.
As for Adobe, I wasn't aware that I have any Creative Cloud products installed, but another penny has just dropped in the sense that, shortly after renewing my CCleaner license I discovered CCleaner's interesting and useful Software Updater function and used for the first time. One of the products that was updated during the process was Adobe Digital Editions, which now leads me to the conclusion that this may well be what the "CC" in the path refers to!
Oh well, I for one certainly found this discussion 'educational', and I sure hope that I won't make the same mistakes/incorrect assumptions again in the future
Before I sign off, I would be interested to know how you (cbaumer0628) managed to convert the path from my screenshot to text – do you have some clever on-the-fly OCR software installed on your device? As it happens, I just asked about this in another group yesterday, in view of the fact that my ABBYY ScreenshotReader installation appears to have become corrupted on my Windows 10 PC
Once again, many thanks for your time and patience.