1. The latest CrapCleaner puts the Yahoo toolbar into your browser unless you untick it when installing it, otherwise you'll have to go to Add/Remove Programs to get rid of it. There is no option in CC to remove - it's an imposition.
2. Microsoft Defender has a -hide parameter against it in msconfig, presumably this hides the system tray icon.
Yes i noticed the hide parameter on the new MS defender entry wonder if theres a workaround to get a tray icon?
As far as bundled BHO's go nero try to get you to download the yahoo one with there updates as well. It also irritates me but a simple untick of a box and no BHO downloaded. I personally dont use ccleaner had a bad experience once.
Then click the donation bit and pay for ccleaner. It helps fund a superb free app and if you READ through the install you would see it's there to be unticked, I noticed it first time round. It's not like it's hidden or incorporated into ccleaner, you are given the option to UNTICK it plainly and openly.