Hi Flip, you can fix 15831 high CPU and memory consumption by adjusting for best performance. In the start screen of Windows 10, press on the Desktop icon, right-click on the Computer icon, and choose the option of Properties. Now tap the option of "Advanced System settings" to go to the "System properties" windows and pick the option of Settings, Adjust for best performance and then go for Apply. In the end, tap OK and start your computer again. Try https://appuals.com/agent-activation-runtime_15831-high-cpu-memory-consumption/ this website for more solutions. You can also Defragment hard drives to resolve this error. To do that tap the Windows button and R, write dfrgui without the quotes in the Run window, and click Enter on the keyboard. Here in the new window, you can press on the hard drives you need to defragment and click the option of Optimize and go for the commands on the screen to exit from the defragment process and restart your computer.