First of all, if your computer belongs to a corporation or is used for work, it is possible that your administrator has made some specific changes that can't be modified by the user. If that was the case you should contact your Administrator.
On the other hand it is possible that you have entered Tablet mode
- Click on Windows icon and search for Tablet Mode on the left.
- Under "When I Sign In" select Use desktop mode.
- Under "When this device automatically switches tablet mode on or off", select Don's ask me and don't switch.
- Restart your computer.
Hope this helps with your query,
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