You can rename a user from 'Control Panel, User Accounts' but that will not change the name of the folder that appears in 'Documents and Settings'. The only way to get a new name in 'Documents and Settings' is to follow rdave13's advice and create a new user, possibly using a generic name such as Owner. When you login as the new user a new folder will be created with the name you specified. You can then delete your old username from 'Control Panel, User Accounts' making sure to select the option to delete all the user's files and folders. Any programs that you may wish to leave on the computer should then be reinstalled while logged in as the new user. If there are a lot of programs that you want to save then click here for how to copy a user profile but do this before deleting the old one.