I recently bought my laptop with Windows 7. My son created a User Account with Admin right. He went back to college and deleted his account by control panel, user account delete method. There in my C:\User\ directory is his user account folder with a lock on it. I can't delete it, even though I took ownership and full control of the folder by right clicking the folder and going thru the security tab. I keep getting "Need to provide admin permission to delete folder" or " require permission from S-1-5-21-etc-etc to make changes to folder" every time I try to delete it. I searched the web but most of the suggestions they gave did not work... I'm at my wits' end right now and don't know what to do to get rid of it. I'm afraid to create any User Account at all now...