« Reply #5 on: September 20, 2017, 04:33:41 PM »
I don't know about it being default. I've used CCleaner far longer than I've used Avast, and I've used Avast since version 4.x. As far back as I can remember, Avast has been unchecked in CCleaner. Perhaps I did uncheck it immediately after installing Avast, knowing what a bad idea it was/is.
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AMD A6-5350M APU with Radeon HD Graphics, 8.0GB RAM, Win7 Pro SP1 64bit, IE11
i7-3610QM 2.3GHZ, 8.0GB Ram, Nvidia GeForce GT 630M 2GB, Win7 Pro SP1 64bit, IE 11
Common to both: Avast Premium Security 19.7.2388, WinPatrol Plus, SpywareBlaster 5.5, Opera 12.18, Firefox 68.0.2, MBam Free, CCleaner