MSN Messenger

Hi,

After running CC, wondered why when I log on to messenger I still see my IDs on the drop down bar. I thought CC was supposed to clean them and all auto completes in general etc. If not, can you tell me why it doesn't and if it isn't cleaning them how do I know that it's cleaning all the other stuff that I wouldn't be able to see like I do on messenger?

Thanks in advance for help