Usually, those popups disappear if you shutdown (full shutdown, with fast startup disabled) and reboot. Do they with you?
https://www.windowscentral.com/how-disable-windows-10-fast-startup tells about disabling fast startup if it happens to be enabled.
Since I went through an ordeal after a Windows update whereby I got a "Please insert media" message and couldn't do anything which was ultimately fixed with the Windows logo key + L I have been getting repeated requests to restart the computer. I just got one a little while ago. I think they're happening about once a day now. I selected "Remind me later" (which it will). There are 2 kinds of restart popups: a long green one in the middle of the screen and a smaller black one in the bottom right-hand corner of the screen.
What should I do to stop the repeated restart requests? I thought of System Restore but would that work? Or use that recovery flash drive that I created but didn't use? Is there an easier way? Computer appears to be working fine otherwise.