Your idea probably will not work. Grab a copy of the easy transfer file program migwiz.exe from windows 7 or 8 disk or working system and login with safe mode into 8.1 and use a program like eraser http://eraser.heidi.ie/ to delete the 8.1 easy transfer migwiz.exe file and replace with older version that will then work. This is really your only option that actually works but getting the 8.1 migwiz file to delete so you can replace it is not as easy as people would like. We can only hope that Microsoft brings back the full wet system in windows 10
You were right. When I tried to install the program it said that I didn't have admin rights. I will do what you have recommended. I want to transfer about 7GB of music and 8GB of photos and another 700Gb of video files to my secondary PC. I cant see doing that with Sky Drive or a flash drive. Connecting the two computers with my cable sure makes a lot more sense to me than those other options.