Does Prio Work on Windows 10?

No, Prio does not work with Windows 10 anymore.

How do I use Priority in Windows 10?

Press Ctrl + Shift + Esc to start Task Manager. Go to the Details tab, right-click the desired process, and choose Set priority and select any value that you want.

How do I permanently set priority in Windows 10?

The following steps might be helpful:

1. Right-click on taskbar and select Start Task Manager.
2. Go to the Processes tab.
3. Right-click on the process you want then select Set Priority then switch it to what you want.