As I came to my computer this morning, a plethora of pop up windows appeared: “Avast Cleanup: An instance of the service is running” and “Your PC is successfully optimized, check out results.” I clicked the “x” to delete (no minimize feature is available) but they just come right back - taking up the right side of my computer window, no matter where I go. VERY annoying! I can’t make these windows go away!! I don’t mind being informed of something, but once I’ve read it, I should be able to delete it. HELP!
and what happens if you reboot?
Rebooting the computer seems to have turned off one of the constantly popping up windows, the one that says “Your PC was successfully optimized” but the “Avast Cleanup An instance of the service is already running” just keeps re-appearing; it says up for maybe 20 seconds or so, disappears, and then IMMEDIATELY reappears. If I click on the X, it just immediately comes right back.
I am also having this problem as of today. I had the same results after rebooting, and I tried going into the Task Manager to stop the process (since it’s also eating up lots of CPU space), but it won’t let me.
As of around 12:20, Central US Time, I also noticed this problem. I will keep closing out the notifications but they keep opening up. Will not be able to access PC for several days, hope it gets fixed by then. This is very, very disappointing and frustrating for an unexplained bug to happen on my computer, for no discernible reason whatsoever. Any fix, temporary or otherwise, would be greatly appreciated.
EDIT: Notifications have stopped, I believe the problem was due to the fact that my next “optimization” was scheduled for 7/30/2015, at 11:59 PM. Despite today being 7/31/15 at 12:50 AM. Maybe it’s an issue with Avast’s scheduling programming, maybe it’s a complete coincidence. I also believe that perhaps it was due to the fact I had it scheduled for monthly cleanings, and it just so happened to land on exactly midnight? Not quite sure to be completely honest.
I had the exact same problem since yesterday afternoon. I tried all sorts of stuff…scanning, turning off the computer and turning it back on, etc. Then, this morning, I turned off the cleanup and restarted the computer after I turned off the cleanup. The window no longer pops up for me after I turn off cleanup. I know that this is more than a temporary reprieve from the problem instead of a permanent solution, because it is obviously less than ideal to have cleanup turned off. However, at least there seems to be a way to get a break from this very annoying pop-up.
I too am having the same problem…it started with Avast Grimefighter rebooting my computer every 20 minutes I closed the grimefighter screen, computer would reboot again. I saw there was an Avast update, I installed it. The grime fighter has not reappeared but now I have the pop up window in the bottom right “Avast Cleanup” “An instance of the service is already running” Cannot get rid of it and it is slowing my computer down.
Is there no help from Avast? It continues… and it’s really slowing down my computer. I paid the money for all this in hopes of speeding UP my computer - instead, now it’s slower.
HELP
there may be a avast cleanup bug (tool is new, previous GrimeFighter)
you could try removing it
Avast 2015: Change, add, or remove individual program components https://www.avast.com/en-eu/faq.php?article=AVKB96#artTitle
I JUST paid for this service, I ordered and downloaded Avast (the security and the clean up programs) just last week, both in hopes of getting my computer up to speed again… now I need to delete it? Do I get a refund?
avast support https://support.avast.com > submit a support ticket
I unistalled the cleanup and so far have not had the pop up again!
That’s the ticket. 
The continual hounding with pop up windows is anti productive.
I am having the same problem, even after rebooting.
a solution you may try is given in reply #8
If you use windows. Go to control panel, then security, administrative tools, services, in the avast row if it says started right click on the row and click on restart. Worked for me.
So we need to uninstall what we just paid for? I just got this 4 days ago… If I uninstall it, do I get my money back?
BTW, I did as suggested and requested a “ticket.” But I never received the email so that went nowhere.
I tried this. Windows reported it could not complete the action. I don’t know if it deleted Avast (and just couldn’t re-start), I’ll need to check that, but the stubborn pop up is still there so I suspect it’s still working.
When did you submit a ticket?
A response is not immediate. The process can take 7-10 business days
That’s good to know. I submitted a ticket yesterday and haven’t received a response.
In the meantime, since I turned off cleanup (did that yesterday), I haven’t had the pop-up. You can turn off cleanup by going to settings, then going to tools, then going to cleanup. From there, you can turn off cleanup.
Of course, turning off cleanup won’t take away the fact that Avast seems to have a problem with the cleanup function right now. However, turning off cleanup will get rid of that annoying pop-up, at least in my experience with this problem.