How do I get rid of virtual desktops?

Neil_H110 
You could try to follow the steps documented in https://answers.microsoft.com/en-us/windows/forum/windows_10-start-win_desk/disable-virtual-desktops-windows-10/13bdf8f4-1c44-4133-8e7c-3214bb674742

"There is a registry setting that may or may not do it.
Getting conflicting reports.
Try just removing it from your taskbar that way you don't accidentally click it.
Before you do this make a restore point because you will be modifying the registry.
https://support.microsoft.com/en-ca/help/4027538/windows-create-a-system-restore-point

Go to search and type regedit
Go to HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced

Double click to open "ShowTaskViewButton"
Set it to 0

If you can't find it then create it.
Right click the advanced and create a dword 32 bit.
Type all one work no spaces ShowTaskViewButton and set to 0.

Now go to following key:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
Create a new key under Explorer key and set its name as MultiTaskingView
Create another new key under MultiTaskingView key and set its name as AllUpView so the final key path would be:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\MultitaskingView\AllUpView
Now select AllUpView key and in right-side pane create a new DWORD Enabled and set its value to 0
"