Windows enters "Test Mode" when the testsigning option is set to ON . This mode allows the system to load and run drivers that have not been digitally signed by Microsoft—a common necessity for developers testing new hardware or users utilizing specialized, uncertified legacy drivers.
bcdedit /enum | find "testsigning"
Type the following exactly and press : bcdedit -set testsigning off Restart Your Computer : bcdedit -set testsigning off
Press the , type cmd , right-click on the result, and select Run as administrator . Execute the Command : Windows enters "Test Mode" when the testsigning option
When you run the command, you should see a success message: Execute the Command : When you run the
| Scenario | Application | | :--- | :--- | | | A developer completes testing of an unsigned driver. They turn off Test Mode to ensure the production system only loads signed drivers. | | Removing Watermark | Users who previously enabled Test Mode to run older software (e.g., virtual hardware drivers) can disable it to remove the desktop watermark and restore security. | | Post-Malware Cleanup | Some malware or game cheats enable Test Mode to load malicious unsigned drivers. This command helps restore integrity. | | System Hardening | Administrators disable Test Mode on production systems to prevent accidental loading of untested or malicious drivers. |