Try this. Start>Programs>Settings>Administrative Tools>Local Security Policy. In the left pane, expand Local Policies, click on Security Options. In the right pane, double click Accounts:Rename the Administrator Account. (This should be 4th from the top of the list, if sorted by policy in ascending order.) Then enter the name you would like. Restart the computer and login with the new name. Another method. Search google and download a program called netuser.exe. Run the program from a cmd prompt. netuser Administrator /name:newname Let me know how it goes, there are other ways of doing this. Later.