Call the main system menu by pressing the "start" button, and navigate to the Run dialog in order to disable the digital signature verification of drivers. Type gpedit.msc in the Open box, and confirm the utility starts the local group policy editor by pressing the OK button.
Open the link "user Configuration" in the left pane of the resulting window and navigate to "Administrative templates". Expand "System" select "Install driver". Find the line "the Digital signature of device drivers" and call its context menu by right-clicking the mouse.
Enter the Edit command and use the check box in the line "Disable" in the next dialog box. Confirm your selection by pressing the "Apply" button and save changes by clicking OK. Please note that selecting "Enable", it is possible to specify the behavior of the system when it detects an unsigned driver:
Before making a decision about how to disable digital signature verification of the driver to be installed, you should be aware of the potential danger of such actions for the system. The fact that the main purpose of the driver is to ensure interaction between the computer and all other devices. Digital signature - a certain guarantor of security. The absence or modification of the digital signature may indicate a viral infection this program or switch in the driver itself. Only the digital signature of the publisher, signed by a CA can serve as a sufficient guarantee of security of the installed driver. An unsigned driver can be used only in case of obtaining it from the license disk of the manufacturer, although the final decision always remains with the user.