Hi Mary, Please share the Operating system installed.  If you are using Windows XP, you may boot the computer into Safe Mode by following the steps below: If this does not work, you may need to restore computer to default factory settings. This step will lead to data (pictures, documents, programs, music) loss. Please perform a data backup prior to this step. Please disconnect any external peripherals (printer, scanner or any USB device) as well.  For more information on PC restore, you may refer to link: [URL]  Please reply for further clarifications. 
Hi, I just bought this used computer a few days ago. I got it home it worked great then I had an idea to get into the control panel and users I set myself up with administrator user and password. Then I went to get back into computer the next day and the first screen that comes up on it is the Administrator and password. This is the only screen that comes up I tried a start up disk but nothing works can't get the start up screen or anything just the Admin and password. Please help!! Oh it's an older style DELL INSPIRON 1200...Thanks! Mary
Administrator lock out!!