Hi,

Thanks for being a part of Windows 10 insider program.

This issue might be due to the resolution of the screen.

I need some more information to assist you in a better way.

1) What the current resolution of the computer?

2) What is the make and model of the computer?

3) Did you make any changes to the computer prior to the issue?

You may follow the below methods and check if helps.

Method 1: Please change the resolution and check if that helps.

1) Press Windows + x, Click or tap Command Prompt (Administrator).

2) Go to command prompt, type desk.cpl.

3) Please change the resolution of the screen to 1366*768.

Method 2: Update the Graphic card drivers.

1) Press Windows + X, select Device Manager.

2) Click on Display Adapters.

3) Right click on each driver at a time.

4) Click Update drivers.

You may refer to the links for additional information.

http://windows.microsoft.com/en-IN/windows-8/snap-apps#1TC=t1

Note: Applicable for Windows 10 insider preview as well.

Hope this helps. If the issue persists or any Windows related queries or issues, please get back to us. We are here to assist you.