Essential Software: Unsigned Drivers in Vista

You have probably found in the course of using Vista that there is protection from unsigned drivers and system files that prevents one from installing certain software or perhaps, special drivers for older, unsupported devices.  Read on to find out about a method of bypassing this limitation..

Developers of new drivers and system files have to pay Microsoft in order to have verified digital certificates for these files.  However, Microsoft knows that developers can’t submit every beta version of their files for verification, so they have devised a way around this in the form of a new mode called Test Signing Mode so that developers can test the operation of their files. 

A requirement of the Test Signing Mode is that the files have test certificates – but not verification.  Fortunately, there is a tool available to both activate this mode and create a test certificate, too.. 


The Driver Signature Enforcement Overrider

In order to install a program that uses unsigned drivers etc, there are a few stages involved:

Firstly, you would want to take note of which files are the culprits that need the special attention – this would be obtained in either in the documentation, or by simply running the installation to generate error information such as the following:


As you can see, I need to focus on the ultradfg.sys driver file in my case.  Afterwards, uninstall the software and follow the next steps. 

Deactivate UAC (User Access Control)

Press Windows Key + R and type in the text below..


Next, select Disable UAC and click on the Launch button..


This will require a reboot.  As you can see above, there is also the option to reverse this step to enable UAC again. 

Install Program That Uses Unverified Files

Right-click on the installation executable and select Run as administrator to perform the installation of your software. 

Disable Driver Signature Verification Check

If you wanted to, you could just keep manually Pressing the F8 button each time on Windows startup and choosing Disable driver signature verification from the menu – but who wants to do that?

The preferred method would be to use Driver Signature Enforcement Overrider to make a persistent change. 

Firstly, download from the provided URL, then run the program and select Enable Test Mode and then, select the Sign a System File and insert the correct path and file name combination into the resultant text box in the Insert Filename dialogue – see below. 


Reboot your system.  Right-click on the installation executable and select Run as administrator and your program should be working! 

Version at the time of writing: 1.3b

Supports: Windows Vista, Server 2008, Windows 7 (including 64-bit versions)

Here is the URL for this essential software:
Driver Signature Enforcement Overrider


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