Next, scroll down to toggle off the “Use Start Full Screen” option.
Then navigate to this path, Personalization > Start.
Tap the Win + I keys to open the Windows Settings app.
Option 1 – Try to check the full-screen setting You could also disable Tablet Mode via Registry Editor or perform System Restore or change the settings in the System tab or the Action Center. You can try to check the full-screen setting, or perform a full shutdown or perform two buttons to restart the Surface devices. To fix the problem with Tablet Mode, there are several suggestions you can check out. If you are one of these users, read on as this post will guide you in what you can do to fix the issue. One of the issues users reported about tablet mode is that they can’t turn off or exit tablet mode. Despite the Tablet Mode’s efficiency, it also encounters some errors from time to time. To make the Windows 10 operating system a lot more user-friendly, Microsoft introduced the Tablet Mode for Windows 10 devices, especially the 2-in-1 devices like Surface Pro and Surface Book. What to do if Windows 10 is stuck in Tablet Mode