One of the security enhancements that Microsoft has added to Windows Vista and Windows 7 is the enforcement to only accept digitally signed drivers in 64-bit editions of those operating systems. The operating system would refuse to install and run a driver without digital signature. There are several points of view on the purpose of this enforcement. Microsoft states that it is important for the security of the computer systems, developer’s don’t like it as much as they have to pay for digitally signed drivers and end users don’t like it because it can mean that the operating system is not accepting some of their drivers (even if they would work properly).
The only way to overcome this restriction temporarily is to press F8 during system boot.But this would have to be done on every boot which can become quite a nuisance.
Driver Signature Enforcement Overrider is another option. The software program makes use of a developer test option in both operating systems to load drivers which would otherwise be rejected by the operating system.
These drivers still have to be signed but not digitally which means that the operating system will accept the signatures that are provided by the software.
This option does come at a price though as it is required to disable UAC, the User Account Control, to run the program in Windows Vista and Windows 7.

How to use the program:
So how do I use it?
First and foremost; you are using this software at your own risk, we do not take responsibility for any damages to your system, but we do not believe it can harm anyone anyway. Secondly, User Account Control (UAC) must be disabled in-order to use this tool as well.1. Go ahead download and launch the application from the link below. Inside its main menu, press on the “Enable Test Mode” button and follow the instructions on the screen. This will enable TESTSIGNING mode, which allows unverified system files to be loaded.
2. Now all you have to do is to add the unverified signature to the required system files. To do so press on the “Sign a System File” button from the main menu, and enter specific filename including full path. For example: if ATITool64.sys from C:\Windows\System32\drivers refuses to load due to driver signature enforcement, you should type: “C:\Windows\System32\drivers\ATITool64.sys”, and if you would like to sign more than a single file, just repeat this procedure until you’re done, and finally reboot.
After you enabled Test Mode and added signatures to the required system files, they should bypass Windows’s driver signature enforcement and load without any issues.
Is it worth disabling UAC for it? This has to be answered by everyone individually. Windows Vista and Windows 7 users who want to give the software program a try can download Driver Signature Enforcement Overrider from the developer’s website.
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