So much stress and the answer is there .. In addition to delete the user files for the old account you can goto computer properties, advanced, user profiles and the username that you deleted will be unknown .. hopefully you copy what you need b4 you delete .. If you run your pc under the Administrator account (any account with administrator provledges) the computer is vunerable and that's what causes most of the errors that are posted on these forums Create a user that has only "User" or if you really need it (which you don't) "Power User" and then when installing software or whatever, just use the "Run As" function to run it with Administrator privledges.