I have a similar problem right now with a Win 8 machine. But there is only one user and it is the Administrator on the machine. Client is running a peer to peer network with 4 workstations (3 Win 7 machines and the one Win 8). "The server" is Win 7. All modules started cycling on the Win 8 machine after ePrint was installed and it's the only Win 8 machine there.

I have already ran the workstation update for ePrint and it is the only module that logs in properly on this machine with the exception of Countersales.

I took the workstation info on all modules. And I noticed this on all modules info: "PDF Must update: [True]; Reg: [] >= File: [20110510]"

Why aren't the other modules picking up the PDF update?