Hello Jules McKenzie-Bell and welcome to the Microsoft Community!
Thank you for your feedback, it's a pleasure to support you!
I think you can refer to the following methods to see if any of them work for you to help you resolve this issue
A. Disable the Virtual Desktop feature via Group Policy
For Windows 10/11 Professional, Enterprise, or Education editions (requires administrator privileges):
1. Open the Group Policy Editor
Press Win + R, type gpedit.msc, and enter.
2. Locate the Virtual Desktop Policy
Navigate to: User Configuration > Administrative Templates > Windows Components > File Explorer
Locate the policy on the right: “Block users from creating virtual desktops”.
3. Enable the policy
Double-click on the policy > select “Enabled” > click “OK”.
4. To force the policy to take effect
Run gpupdate /force at the command prompt to refresh the policy.
Effect:
Disables all virtual desktop functions (including Win+Ctrl+D, New button in Win+Tab interface).
You can still see the current window in the task view (Win+Tab), but you cannot create a new desktop.
B. Disabling virtual desktops through the registry
For Windows Home Edition (no Group Policy capability) or if you need to deploy quickly:
1. Open the Registry Editor
Press Win + R, type regedit, and enter.
2. Locate the registry entry
Navigate to: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
If the Explorer item does not exist, right-click on the blank space > New > Item and name it Explorer.
3. Create a new DWORD value
Right click on the right margin > New > DWORD (32-bit) value, named NoDesktopCreation.
Double-click the value and set the data to 1.
Disclaimer: Modifying the registry or workgroups is usually geared towards advanced users, administrators, and IT professionals, and it can help fix some problems, however, improper registry modifications can cause serious problems. Therefore, please make sure to follow the steps below strictly. For further protection, make a backup of the registry before modifying it. For more information on how to backup and restore the registry ref:https://support.microsoft.com/en-us/topic/how-to-back-up-and-restore-the-registry-in-windows-855140ad-e318-2a13-2829-d428a2ab0692
4. Restart Explorer or your computer
Task Manager > Right-click Windows Explorer > Restart.
Effect:
Block the creation of new virtual desktops, but make sure that this registry entry is applied to all student accounts (can be deployed in bulk via script).
C. Disabling the Task View (Win+Tab) Function
If you need to completely disable Task View (including virtual desktop switching):
1. Group Policy Method
Path: User Configuration > Administrative Templates > System > Ctrl+Alt+Del Options
Enable the policy: “Remove Task View”.
2. Registry Method
Path: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
Create a new DWORD value NoTaskView and set the data to 1.
Disclaimer: Modifying the registry or workgroup is usually geared towards advanced users, administrators and IT professionals, and it can help to fix some problems, however, improper registry modifications can lead to serious problems. Therefore, please make sure to follow the steps below strictly. For further protection, make a backup of the registry before modifying it. For more information on how to backup and restore the registry refer to the:https://support.microsoft.com/en-us/topic/how-to-back-up-and-restore-the-registry-in-windows-855140ad-e318-2a13-2829-d428a2ab0692
D. Deployment of centralized monitoring and management tools
In order to meet legal compliance requirements, it is recommended to deploy professional education management software, which will help you to centralize your management:
Recommended tools:
Netop Vision: Monitor student screens in real time, restrict applications and websites.
Impero Education Pro: Disable virtual desktops, record activity logs, remote control.
Microsoft Intune for Education: Disable virtual desktops in bulk with policies.
We look forward to hearing from you!
Kirito|Microsoft Community Support Specialist