Many registry changes require one to reboot to test. Or so the Microsoft documentation states. Actually the registry is read when Explorer loads. If you want to test a series of registry changes and do not want to set through a series of reboots, stop and restart Explorer. In Task Manager click on the Processes tab, highlight the explorer.exe process, and click End Process. This ends Explorer. To restart, select File then New Task and type in explorer and click OK.
