It is slow over the network for one. The server itself seems to be slow to respond but only when there are lots of people at work (which I expected would cause some performance decreases).

It functions as an App server, DNS, DHCP, WINS, file, printer and a DC. Yes it does a lot, but it has been doing this for a while. I still am led to believe that a better design for our network would do some good stuff for performance on this server as well as the other main File and Email server on our network.

I'd say the main two issues I am trying to resolve are the slow response times from the Application and the lag in response I get from the File server (mainly it just hangs when you try to access it and then after a minute will be very quick as if it was waiting in line on the network).

Hope this helps and I am going to see if I can use the performance monitor to identify the problem, but I am not the best understanding what is overloading and what is within normal functionality, guess I'll just have to try it and learn it.