CCleaner and Google

I love this program. It is just amazing. My question is this: every time I run CCleaner, a message pops up that Google must be closed, so I check off the box and then get another message about closing Google. I exit out of Google before I start running CCleaner, so why do these messages keep popping up. I realize it is not big deal, but it is a nuisance. I hope you can help,

Please see here

http://forum.piriform.com/index.php?showtopic=40285