This issue has been plaguing me for some time now, I'm hoping you experts can help.
I have 3 PCs set up at home, all running WinXP SP1 with Sygate Personal Firewall. I have file sharing enabled on each machine, and have configured a few shares.
However, when i try to access the machine, either by typing the UNC mahcine name, \\MACHINENAME, for example, the authentication dialogue appears, but i cannot specify a user name. The field where i usually enter my username is 'Greyed Out' with the word MACHINENAME\GUEST in it, of which i cannot change.
Here is a link to a screenshot that depicts the above behaviour: http://www.aktiveonline.com/share.jpg
The password field is as usual, and i can enter into it. Its just the Username field i cannot seem to change.
I have disabled simple file sharing, and checked that Sygate Firewall is allowing connections via Network Neighborhood, all to no avail.
I look forward to your suggestions.