CD infected with Win32/Virut.W

[Apache]

I recently got a CD from a magazine. (Maximum PC) (Note : The CD has a lot of setup programs on it.) I used it, and it worked flawlessly.No problems. I then put it up. Today, I got it out,started a program on the CD, and got infected with Win32.Virut.W (Symantec). (I still have absolutely no idea how it got on the CD). ( I then disabled autorun on my computer)I removed it easily, and then later, started two different .exe setup programs. They both were infected. I ran Malwarebytes Anti Malware and it removed Win32.Virut.W again, and a worm it dropped (Worm.Autorun.B.) ( I haven't touched the CD since) I then scanned the CD with Malwarebytes Anti Mal ware , and Iobit Security 360. They both didn't find anything. (Even though clearly, the virus has infected several and probably all of the .exe files.)

So,
How can I disinfect my CD?
How did it get on my CD in the first place?