Copy the contents of the Office disc to a USB flash drive. If the flash drive has other things on it, simply create an Office folder and copy the contents to the folder. Instead of AutoRun, select the "Setup" program...that should get the install going. Then it should just go normally.

Windows 8.1 will run older windows programs like Office 2010, but you will not benefit from the touch-friendly features in Office 2013.

You can also install the program by using an external DVD drive plugged into the USB3 socket, or by linking your Venue 11 Pro to another PC on your network with a DVD drive. 

Chris

Not sure if you still have a desktop or laptop.

I always put my DVD's in a drive on my desktop which is shared over the network or only shared with Homegroup members and install from there. For me it was the easiest way, no copying around on different drives like USB.