Chances are something's just blocking it from installing the devies' drivers; Malware software, anti virus software, your firewall or something along those lines.

Look in your system tray for any that may be running and set them to disabled or "off" when you plug your USB device into your computer. For example, on my computer I run:

• PeerBlock (set it to "Disabled")
• Microsoft Security Essentials (go into Settings | Real-Time Protection and uncheck the box)
• Comodo Firewall (right-click it's icon and set all features to "Disabled")
• MalwareBytes (I usually don't need to disable this one, but it wouldn't hurt to try if you still have issues installing the device driver after disabling everything else you may have running)

Whichever similar apps you may have running, if other than any of the above, just do the same thing. Once you get the USB device drivers installed just set them all back to what they were.