If you are talking about Internet Explorer saving your passwords for you, try this.  In Internet Explorer, click on your Tools heading and select Internet Options.  Then go over to the Content tab.  Once there click on the AutoComplete button.  From that menu you can clear all of the boxes that IE will save your info for.  Either that or you can just uncheck the sub-box at the bottom that saves your form passwords.  After that click both of the buttons to clear your usernames and passwords and you should be good to go.  Just for good measure I'd go back to the general tab and clear all of your Temporary Internet files and cookies.  Good luck!

Glad I could help!