Reboot your computer if Windows 10 Night Light still doesn’t work when you sign back in. Before you restart your device, try signing out of your profile/account and signing back in-press the Windows button, click on your profile icon, and select Sign out. If the problem is due to a temporary glitch with your operating system, rebooting your computer might help restore Night Light to normalcy. That’ll trigger your computer to obtain accurate date & time information from the Windows Time Server. Afterward, click the Sync now button in the “Synchronize your clock” section.
