Hi LUMore-
I'm Kevin B., I do apologize for the inconvenience that you're experiencing right now, let me help you sort things out.
When did the issue started? Is this a personal computer or connected to a domain?
Kindly hover your mouse in the app in your taskbar (don't click it).
Once the preview window shows up kindly right click on it.
Click on move.
Use your arrow key and see if you will be able to pull it up on your screen.
If issue persists,
Kindly go to settings > system > display.
Check your scaling layout and your display resolution if it is set to recommended.
Also,
Kindly try to update the display adapter driver of your windows and check if there's any changes
Update the Display Adapter driver on your computer
Press windows key + X
Select Device Manager
On the device manager, locate and expand display adapters
Right click on the display driver that is currently installed
Select Update Driver
Select search automatically for drivers
Windows will search for an available driver software online
Wait for the process to complete
Check if everything works fine
Kindly keep me posted of the result
Hope this will help and have a bless day!
Thanks.
Kevin B.
Independent advisor