The nitty-gritty first:
CCleaner v2.26.1233 (Yes, I know there's an update but haven't gotten around to doing it.)
Browsers: IE 7 and Google Chrome
Antivirus: AVG (free)
I started using Google Chrome when IE couldn't handle some newer web designs nor handle games that use heavy Flash.
For all other tasks and Internet needs, I use IE.
I often have multiple "tabs" or separate pages (several windows) open at the same time on both Google Chrome & IE.
Problems with CCleaner:
1. CCleaner runs and functions fine with IE still open, but not with Google Chrome open.
2. CCleaner prompts to close Google Chrome (if I forgot to close GC). BUT even after I close GC, the CCleaner program still says 'Close Google Chrome first'. Let's say I'm playing Games via Facebook. I close all Google Chrome tabs or windows. I open CCleaner -- whether immediately, or hours later. CCleaner says, 'Close Google Chrome'. I look up & it IS closed. I close CCleaner. I go to Task Manager--I do NOT see anything in processes that leads me to think Google Chrome is in use. I re-open CCleaner and try again; It says 'Close Google Chrome' OR it says, 'Ha-ha, CCleaner will stop (before we even start this) if you don't close Google Chrome.' I say back under my breath, "Google Chrome IS closed, Mr. CCleaner, so please do your job!" CCleaner still argues with me, convinced that Google Chrome is still opened. It's hard to argue with a computer program. ;-) I give up and close CCleaner.
3. (My trick....) When CCleaner believes Google Chrome is still open and refuses to recognize Google Chrome IS in fact closed (even when everything closed), I then re-open (or close and re-open) Internet Explorer to any page (usually to Google Mail). In other words, CCleaner needs a swift kick or needs tricked to recognize that Google Chrome is CLOSED.
4. Sometimes, the trick listed in #3 still does not convince CCleaner that Google Chrome IS closed. Then, CCleaner just won't get past its error until I completely shut off the computer. The next time, CCleaner DOES work fine again.
This error concerning Google Chrome isn't a biggie; at least my trick does make it function again most of the time.
But, I'd love to find that CCleaner & Google Chrome have gone to mediation, have worked out their problems with each other, and find that they don't include ME in their squabbles with each other. ;-) Just once, I'd like to end a day on the computer by closing the 2 browser types, running CCleaner, and going to bed without having to use any trick or re-starting the computer just to get CCleaner to believe me that 'he' is NOT being stalked by the CLOSED Google Chrome program. It isn't nice that CCleaner is so wary that it becomes 'paranoid' and believes Google Chrome is still open.
I hope you can be the 'Mediator' of this annoying issue.