It would be nice to see an option that allows you to set CCleaner's CPU priority (even if it's just Normal, BelowNormal and Low). I run CCleaner instead of emptying the recycle bin, just to get all the other things that CCleaner cleans as well. I'm also a fan of the 7 pass deletion, and it sucks up the whole cpu for a few minutes sometimes, depending on how many files are in the recycle bin. Just a thought...