|It would have depended on how the users logged on. If they logged on as local users and not domain users then you can simply change to workgroup. In fact if they had been logging on as domain users well, they would not have been able to since you say you don't have a domain.|
Just change the computer to a workgroup and be sure everyone logs on as a standard or limited user.
I support the 'Everybody Draw Mohammed Day'. A religion doesn't deny my freedom.