I had an user that "restart" was a Windows 10 Reset and there was a lot of work to get it working fully again.
If you mean reboot, then reboot one more time. Also, does it happen in other user accounts? Remember folk, we can't run Windows without a spare admin account to help fix small issues.
I did a restart of my Windows 10 and when it came back up all my icons had disappeared from the Taskbar. I cannot figure out how to restore them. Any help out there?