We have a Windows 2003 fileserver (demoted from a DC a few months ago). Anyway after we rebooted following an update a couple weeks ago is where the problems first started. The IPsec service would not start and therefore would now allow any TCP/IP traffic. We don't need that service so we disabled it and all was fine, or so we thought.
A few days later we recognized very slow transfer rates between drives. For example, saving a 22mb file from one drive to the other takes about 4-5 minutes. Also, bringing up the mail client is brutally slow as well, especially if you have a ton of stuff in there.
We rebooted again the other day and got another warning about another service (again one that was not needed (appletalk?)) not starting. So we are not sure if it was the update that hammered something or something else with these seemingly random services failing to start.
We have checked the DNS and hardware etc... Server has 2 NIC cards and both exhibit the same behavior. Has anyone seen this happen or have any ideas of things we can check?