What Is the WMI Provider Host (WmiPrvSE.exe), and Why Is It Using So Much CPU?

The WMI Provider Host process is an important part of Windows, and often runs in the background. It allows other applications on your computer to request information about your system. This process shouldn’t normally use many system resources, but it may use a lot of CPU if another process on your system is behaving badly.
by Chris Hoffman via How-To Geek