This is an SBS2003 server which has started giving performance issues. Users are reporting that disk access is very slow and often there are 20 second pauses while they wait for something to happen. I can see also when I log in on Remote Desktop, it takes ages to get my desktop whereas it used to be almost instantaneous. When I look at TaskManager, it is usually showing the systemidle process at 99%. So I dont understand what is going on.
I run TrendMicro antivirus on this server. I was suspicious that this might be causing the problem. TrendMicro have superceded the program with another called Worry Free Antivirus. So I uninstalled the orginal software to see if there was any improvement. Unfortunately there wasn't. I've installed the SBS BPA and carried out all the recommendations. I've also re-run the CE-ICW.
What else can I look at in order to see why this server is performing so badly?