I just pushed out an update of the Rift Version of Multiscreens ("Launch Multiscreens in Oculus VR Mode") that allows you to capture the entire desktop in Multiscreens in Windows 7 :) (you could already do this for Windows 8+) There will be a little blue icon in the taskbar that is your desktop and you can pull up that window to have full desktop capture :)
It is slower than Desktop Capture for Windows 8+ which is why I normally didn't have it as an option, however if you are on a Rift and enable ASW the performance should now be decent enough to be usable.
So enjoy! Let me know if there are any bugs you run into. I could also make this work for the Vive, however without ASW it is fairly laggy, so it is up to you all if you would like me to add this or not.