Btfh

when i try to access one windows xp machine from another xp machine (both pro version), i get the following error. http://btfh.net/error.jpg the network we are on is a simple one, no domain controller, workgroup set to workgroup. We've tried turning guest accounts on, turning them off, etc.......any suggestions?

thank you for the hint regarding secpol.msc. As it turns out, the problem was a new policy inside there that was introduced by another program i believe. The network now performs as desired