Nevermind that since you don't know. Here's step by step what to do:
Put the disc in the drive in the pc that can read it well. Use MagicIso to make an .iso file on that computer's C drive. So you should have something like
C:\Disc2.iso when you're done.
Now go on your gaming pc and open Computer (Windows Explorer.) Hit the Map Network Drive button. In the folder box type
(a real world example would be \\192.168.1.35\C$ or you could replace that ip address with computer's name instead)
and check the box to connect with different credentials. Hit finish and it will ask you the user name and password of the pc with the .iso on it.
It will open up the C: drive on that computer with the .iso. Copy and paste the .iso to a drive on your game machine. Now use PowerIso to mount the .iso.