using magiciso to read/mount iso files, or write them?
because you can just double-click an ISO in Win 8.1 and it will mount it as a new drive for you.
If so, thanks for the tip. I will try that out with the Office 2013 ISO I was trying to install
If you get an error message (I always do), check to see if the drive was mounted anyhow - for some reason I get an error presented, but it always works.