|Any server 3 yrs or older is old. We replace ours on a 3 yr cycle due to all the major changes in hardware and software.|
You should not be using a single server, that runs everything, for a Terminal/RDP server. This should be on a second server. This is because RDP sesssions consume server resources.
What is the cpu and memory of this server?
You should enforce GPO's that don't allow users to run games or apps not approved by administration.
This should get you started on crash dumps