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MS Windows 8 Driver Signature Enforcement

Windows 8 Driver Install

In Windows 8 on a 64-bit operating system, you must disable the Driver Signature Enforcement to install some old or unsigned drivers.

Once the Driver Signature Enforcement in MS Windows 8 OS is disabled the system will reboot, then you will be able to install the driver. Upon system reboot, the Driver Signature Enforcement will default back to enabled, but once the Driver is installed for the first time, you can install a new version without having to disable it again in Windows.

Warning! Please remember that you are doing this at your own risk without any warranties! Don't do this if you don't know what to do if your system doesn't boot or work properly after this. None of us are to be held liable if something goes catastrophically wrong etc.!

To disable Driver Certification Enforcement in MS Windows 8:

For the first you should open the Charms Bar in Windows 8 in the right side of the screen and select Settings, or simultaneously press keys Win+I. Select General. Scroll to the bottom of the General page and select Restart Now under Advanced Start-Up:
Windows 8 General
You can also perform this with command promt and command shutdown.exe /r /o /f /t 00
Once the PC comes back up, select Troubleshoot:
Windows 8 Troubleshoot

Select Advanced Options:
Windows 8 Advanced Options

Now select Start-Up Settings and click on the Restart button:
Windows 8 Start-Up Settings

On the Startup Settings screen:
Windows 8 Startup Settings
Press either the F7 key or the number 7 key from your computer keyboard. This disables the Driver Signature Enforcement, which will allow you to install your driver.
After pressing either key, your computer will reboot. Now, log in as normal and go to the Control Panel. Select "Devices Manager" and you are ready now to install the driver as usual. You can see Windows Security alert during driver installation: Windows can’t verify the publisher of this driver software:
Install driver anyway
To proceed with installation you must select: Install this driver software anyway.

If you can not load your system in the Boot Menu state you can try to swith off any specaial BIOS fast-boot features and try from the beginning.