This is a very simple system with 2 computers - one acting as an application workstation AND as an application server to the other computer.
The app .exe is instantiated on the 2nd computer with the .exe resident on the "server".
This may be done directly by opening the C: drive on the server from the "client", by mapping the C: drive from the 1st onto the second and executing out of that "drive", by putting a shortcut on the Desktop of the 2nd computer pointing to one or the other as above.
Lately the "client" computer has started running this one app very slowly and sometimes appears to hang. It looks like a network access issue.
- It appears that the network is fine.
- Internet access is fine
- One can open files on the "server" from the "client" at normal speeds.
- However, opening this one app takes 30-60 seconds I'd guess and interactions sometimes appear to hang the "client".
I note that the arrangements stated above are all "standard" for this app - a commercial small office business application - namely Avimark for veternarian clinics.
I've tested the client computer:
- cleaned it of parasites
- extensive hard drive test
- extensive memory test
It works fine until it's on this network and trying to use this one app.
Norton firewalls are set up to allow the subnet and the program and I've done some experiments with turning off the firewall on the client at least.....
Also, if I right-click on the app's Desktop icon on the "client", I can't get properties up in any reasonable time at all. It just seems to hang.
At the same time, I've had a Wireshark capture runnning on the client and the right-click generates lots of 2-way packets referring to SMB but I've not been able to analyze them yet. Thus it may be that there's some unsuccessful handshaking going on??
I don't think this is getting anywhere fast. Any suggestions?