If Test Mode watermark is appearing on your Windows 10 desktop and you are not sure why this watermark with Windows 10 build number appears at the lower right corner of the desktop, continue reading this article to know what is Test Mode and how to enable or disable Test Mode in Windows 10.

Well, the message or watermark Test Mode is appearing on your Windows 10 desktop because Test Mode is enabled on your PC and your PC is running in Test Mode.

What is Test Mode?

Test Mode is a feature in Windows operating system which allows users to install and use drivers that are not digitally signed by Microsoft. The feature comes in handy for users who want to run or test programs that don’t have an authenticate certificate.

In short, the Test Mode message indicates that you have turned on the Test Mode or a program/driver which you recently installed turned on the Test Mode. For instance, when you install Trackpad++ program, it turns on the Test Mode.

If you didn’t turn on the Test Mode, it’s a good idea to turn off the Test Mode.

Turn on or off Test Mode in Windows 10

Here is how to turn on or off the Test Mode feature in Windows 10.

IMPORTANT: Please remember that turning off the Test Mode feature may force the program/driver which is not digitally signed stop working.

Step 1: Open Command Prompt as administrator. To do so, type CMD in Start menu search to see Command Prompt in the search result. Right-click on Command Prompt entry and then click Run as administrator option. Click Yes button when you see the User Account Control screen.

Step 2: At the Command Prompt window, execute the following commands:

To enable the Test Mode:

Bcdedit.exe -set TESTSIGNING ON

To disable the Test Mode:

Bcdedit.exe -set TESTSIGNING OFF

If the above command didn’t work, this one must work:

Bcdedit.exe -set loadoptions ENABLE_INTEGRITY_CHECKS Bcdedit.exe -set TESTSIGNING OFF

You may exit the Command Prompt now.

If the Test Mode message/watermark is still appearing, reboot your PC once.

You might also want to know how to boot into Safe mode in Windows 10 guide.