Default No Rom, No Backup, PC wont mount Nexus 7

I cracked the screen on my Nexus 7 and had to send it away for repair. In the process the tech reset the device, I can access TWRP but when I plug my Nexus into my computer it failed to install the drivers. I went to device manager and it shows Nexus 7 with the yellow exclamation point.

Can someone point me into the right direction of being able to get my computer to recognize the nexus so I can load a ROM on to it?