intensity pro 4k drive

I need help with installing drivers for intensity pro 4k, it worked before formatting my pc but now reinstalling windows 7 ultimate 64bits does not allow me to install. When I look at the device panel I can see that in the video sound drivers and in the game devices is Black Magic Intensity pro 4k but with an exclamation point in yellow and they tell me that "Windows can not verify the digital signature of the drivers ". Required for this device. A recent hardware or software change may have installed a file that is not properly signed, corrupted or malicious software from an unknown source. (Code 52) ".
I uninstalled all the software, rebooted, reinstalled, restarted but I can not make it work.
Windows 7 ultimate 64bits; msi A68HM-E33 V2; SSD; 12 gb ram; amd A10-7870k; amd radeon R7 grafics.
the help is appreciated