thats weird it should work, delete any root files that you downloaded and re download the .zip files that ldrifta had posted above cause thats the right root method for zvc/zvd. Make a folder on your desktop and extract the .zip file to the new folder. Turn off uac from control panel and user setting and reboot your system. Cause some anti virus software might see it as a threat and delete the files needed for the Root exploit to work.
Go to setting on your phone andand tap Connectivity and tap Default connection mode and choose Internet connection and restart your phone while its not plug in to the pc.
when you plug in your phone to the pc and both had restarted go to Device manager and see if you see this.
Look at the status bar on the phone and you should see 2 icons, usb and debugging look below at the pic.