ALT-TAB works OK on my Windows 11.
Try this:
Modify ForegroundLockTimeout registry value
- Press Windows key + R to invoke the Run dialog.
- In the Run dialog box, type regedit and hit Enter to open Registry Editor.
- Navigate or jump to the registry key path below:
- Computer\HKEY_CURRENT_USER\Control Panel\Desktop
- On the right pane, double-click on the ForegroundLockTimeout entry to edit
its properties.
- In the properties window, select the radio button for the Decimal under Base.
- Then, set the Value data to 0.
- Click OK to save changes.
- Exit Registry Editor and reboot your device.
OR
Modify AltTabSettings registry value
- HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Explorer
- On the right pane, double-click on the AltTabSettings entry to edit its properties.
- If it is not present, you have to create a new one. Right-click anywhere on the right pane and select New > Dword (32-bit) Value. Name the key AltTabSettings.
- In the properties window, set the Value data to 1.
- Click OK to save changes.
- Exit Registry Editor and reboot your device.