According to Microsoft, unsigned drivers are the cause of many crashes and other instabilities of the system. That is why Windows Vista crashes default installation of unsigned drivers. We will see how to override this check and simply install a driver not signed.
To disable the signature verification, just open a box Run with the keyboard shortcut Windows logo key + R.
Then type the following command and press:
bcdedit /set nointegritychecks ON
Restart your computer and then install your driver that normally was a problem before.
Once the driver installed, we will replace the signature drivers verification. To do this, open a box again Run and type the following:
bcdedit /set nointegritychecks OFF
You will have to make a final restart of Windows so that the command is taken into account. This method will allow us to install a driver really with simple ways.