Hey...I went to www.ccleaner.com and downloaded the PROGRAM and ran a CLEANER, just to clean things up here. I thought it was great. The only problem is that it said I had to install a Yahoo TOOL bar, so I did, and then went and uninstalled the toolbar because I hear toolbars can cause problems. So I did that. The problem is that my MSN screen change is different now. It's one I don't like. I can only tell you that it SAYS beta-msn.com I don't know what is going on. I wish I knew more about what I was doing.
You did not have to install Yahoo toolbar. You may elect not to install it soon after STARTING the installation of CCleaner. Also, unknown to many users, you can download the Basic version from http://www.ccleaner.com/downloadbuilds.asp; it's the same as the Standard Build except for the Yahoo toolbar.

CCleaner has a forum on their site for CCleaner users. I suggest you visit their forum and post your question; see http://forum.ccleaner.com/Just uninstall. If you need to uninstall ccleaner do that too and just be careful when reinstalling to uncheck one of the boxes.