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The Windows 7 Testmode is a special operating system mode in which it will allow the usage of unsigned drivers. Usually device manufacturers have to sign their drivers via Microsoft.

In order to test those drivers there is a test certificate which allows the driver developers to test their drivers.

Since I felt annoyed by this test mode watermark on my desktop I decided to get rid of it.

How to disable the test mode?

1. Enter a command prompt: cmd.exe
2. Type the following command: bcdedit -set TESTSIGNING OFF
3. Reboot.

How to enable it again?

1. Enter a command prompt: cmd.exe
2. Type the following command: bcdedit -set TESTSIGNING ON
3. Reboot.

How do I check if it’s enabled or not?

1. Enter a command prompt: cmd.exe
2. Type the following command: bcdedit