We have a customer with Small Business Server 2011 who's server is constantly at 100% CPU usage. Task Manager shows sqlservr.exe as always being the highest consuming processes. I am seeing three copies of sqlservr.exe and one sqlwriter.exe. The server is a PET320 with 24GB memory with an average of 15GB free, and a 4 Core Zeon E5-2407 2.20 GHz.
I have little experience with diagnosing issues with SQL server. Can anyone suggest a course of action?