Welcome. I ask to be sure that it is known to you a way to force the Windows 8.1 x64 to turn off when you start checking the driver signature? Now, after upgrading to Win8 for Win8.1 - I had "from the beginning" to install the drivers that do not have a signature (HASP Emulator - MultiKey) . DSO1.3b does not work (ie not make changes ) for the mode "Test mode" . I started the "manual" mode checking signatures to force drivers - and then installed the driver "Multikey" and tried to go "sign" in DSO1.3b. After reboot, the driver is oczywście with a yellow exclamation mark. Changes in Bcdedit contribute nothing (only you can see the trademark on the lower right screen). Edit GPEdit - also does not bring a solution. I have no idea how to force Windows to without having to wade through the bootloader menu - boot from the forced exclusion of checking signatures your drivers? For as manually choose the "7" is the driver is no yellow exclamation point and everything works without any problems . It's "only" about automating the process of booting from a particular option. BTW - is it possible or "appending" to the image of such a driver installation CD Win8.1 and the driver then he or she will be seen "as a properly signed" ? greetings q.