Windows host process (Rundll32) high CPU usage

Hello, I was having the same issues with rundll32.exe using a lot of my CPU usage. Here is what was causing my issues.

Step One: I downloaded Process Explorer. This is an excellent tool. It is similar to Task Manager but goes into way more depth on the processes and dlls that are running. I extracted the download and then ran Process Explorer as an administrator.

Step Two: One of the first things I noticed was rundll32.exe was using 23 percent of my CPU again. 

I right-clicked on the rundll32.exe process and selected properties. I clicked on the Image tab and at once saw the culprit. A utility to monitor and gauge my battery usage, called PwrMgrBkGndMonitor, was draining my battery instead of saving it.

Step Three: After a little digging around in my installed programs I located a program called Lenovo Settings Dependency Package. PwrMgrBkGndMonitor was installed in the Lenovo Settings Dependency Package.

I didn’t use this program and decided I didn’t need it. I uninstalled the program and restarted my laptop. I haven’t had a problem with the rundll32.exe using up my CPU since I uninstalled Lenovo Settings Dependency Package.

If you are experiencing the same symptoms has stated above and you are running a Lenovo laptop with Windows 8.1, this may be your issue. However, before you uninstall the program I would recommend using Process Explorer. Process Explorer will help you determine the exact program that is giving you issues before blindly uninstalling and killing services. I hope my troubleshooting steps can help you find program is making rundll32.exe use high CPU usage. Let me know in the comments if this helped you!