Ok so this problem has not gone away. It seemed for a moment that the computers were all doing fine, but then I noticed the laggg from the fileserver again.

It seems that any machine that is a couple switches away from where the fileserver connects or even just one switch over can become laggy when trying to get into the share drive on the server.

I never experience it because I am connected on the same switch, but It really is annoying when you have to wait for it. I found some critical NIC driver updates, but I have to come in early so I can install this without cutting people off from their files.