Basically, at Windows XP Welcome Screen, simply press Ctrl-Alt-Del keys sequence together twice, and you will be shown a Log On to Windows menu which you can specify User Name and Password. In the User Name text box, key in “Administrator” (without quote) and leave the Password field blank. Then press Enter or click on OK. If there is not a password protecting the Administrator account, or blank password is set, then you will be able to access XP with full administrative powers as Administrator. Then you can go back to Control Panel/User Accounts and put your account back to Administrator.