Could we revisit this topic ? I am troubleshooting a friend's very slow computer, and after fixing other problems I am left with a WmiPrvSE.exe process that is using 30-40% of the CPU and 2 GB of memory continuously. When closed, another identical process opens immediately. I checked, and WMI performance is in Manual mode. I installed Windows Process Explorer, and working back up the tree it is WmiPrvSE.exe, then svchost.exe, then services.exe, then wininit.exe. There is no window associated with this activity, and I cannot change the priority of the process. Killing the process or the entire tree only results in a new instance of the process. I am new to Process Explorer - what can I do to identify the origin of this problem ?