Sorry this is a long one!!
I have a windows 2003 server (standard) on the latest up dates etc. It was working perfectly until 3 weeks ago. Since then all the connecting workstations have been hanging (about 57 workstation's). they will work fine for about 20 mins then they will all start hanging and only way to get them back is to restart the pc. There is no pattern to which ones hang. There is nothing showing up in the event log etc.
We have changed out av from trend to grisoft network edition. but i have 5 other sites on the same setup and non of these have experienced problems of this.
We have replaced all switches from dlink to netgear which helped the problem but it came back within a couple of days. also the server's network card has been replaced and the same happened. We have removed terminal services as we used to run these on some old pc's thinking for some strange reason it was a licence issue (as we only had 15 ts licences). This did not help. We have disabled the av and the problem of hanging workstation's still accurs.
Myself and a external company both agree that the problem is server based, but neither of us can find what the problem is. All hardware is working fine.
As far as both of us are concerned we have covered all eventualities, and next week we are taking the server out and doing a complete reset up of the server.
Has anyone got any suggestions which we might try to try and avoid this work!!!