Yes, I'm using task manager. I'm not sure what the "buffer pool" is but what I do know is that if I do the following commands

NET STOP "SQL Server Agent (BRKSQL02)"

NET STOP "SQL Server (BRKSQL02)"

then task manager shows that the total Memory used goes from 15.6GB to 800MB and other programs (such as remote desktop) are then usable, that is for the next hour or so when SQL Server hogs it back up again. Is changing the amount of buffer pool the wrong way to limit SQL Server? Should I have something in the "Minimum server memory"? Currently it's a 0.

Thanks for your response!