At work I have to access a hard disk that is on the network — it sits in a totally different part of the building. For the past A MILLION YEARS I have been trying to access files on it because Windows is being a jerk and not letting me access the stupid thing. It says the user name is not found.

Well today I found how to clear the details that Windows had saved so that I can login again with the right details.

Go to the Control Panel. Open then User Accounts applet. Go to the advanced tab, then click the Manage passwords button. (I made an image).

A list will appear with all the things you have stored passwords. Simply click on the one you are having problems and remove it. Praises be to God.