I opened Process Explorer to see what was happening when I opened and closed my browser (Internet Explorer 11). It looks like Edge continues to run in the background through multiple dll's. I opened CCleaner and placed the two windows side by side. Through PE I killed the process 'dllhost.exe' and immediately ran the cleaner. I didn't get the usual 'Internet Explorer and Edge need to be closed' notice and there was no indication that Edge files were skipped.
Because you have to act quickly (the dll host will restart immediately after you stop it) you might try using a .bat file? I don't know if this is exactly right, but close:
You are correct once dllhost.exe aka Com surrogate is ended CCleaner can clear EDGE, any eta when CCleaner will do this for us instead of us have to do it manually? I was wonder why there is always 1 instance of that running now i know why
Windows 10, Microsoft Edge Cache Database - please make it stop!
in CCleaner Suggestions
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You are correct once dllhost.exe aka Com surrogate is ended CCleaner can clear EDGE, any eta when CCleaner will do this for us instead of us have to do it manually? I was wonder why there is always 1 instance of that running now i know why