Small domain using windows sever 2003,, clients are vista and xp, does not seem to matter operating system, but suddenly my users, who are all local admins, try to access Lytek, a medical billing software that uses SQL, they are getting a runtime error and the program closes.
It's not tied to certain users, but certain machines. Any user that goes to the right machine can login with no problem, but any user that tries to log in with the problem system cannot.
It might also be notable that we have two remote offices that use a vpn connection and then run this program from the server via rdp, they are not able to login with rdp either.
I've compared everything I can between the working systems and the problem systems, but can't seem to find the discrepancy.
This was working fine on all systems until the first of this week, might have started last week.