What do you mean by "any user"?
What are you using to allow other users to connect to your computer?
Do you really want to allow other people admin rights on your system?
I have admin privileges to my machine but when someone tries to connect to it by typing either the computer name or the IP address
(\\computername or \\Ip). The user is forced to use the guest account. Moreover the Guest account is not highlighted. What can I change so that when any user connects to the windows XP machine he/she get a prompt where one can enter (existing account) username and password instead of being forced to use the guest account.