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If that's the case, I believe if you Search for *.pwl files, and delete the one that is your default username on the machine, it will require all new passwords for that sort of thing. It will ALSO, mind you, require re-entry of ALL your saved password info, which may cause heartburn in some cases....
If this isn't right (and PLEASE don't do it until it's verified by someone else who's used Content Advisor! - I don't have kids, I don't bother with it) someone else herein will no doubt give you the right info. If not, you should probably access MS's knowledgebase - bound to be in there somewhere (it's not a really easy site to use, I find....)