Hi Goober,
Don't want to make this too complicated, as I do not know you nor your level of experience with operating systems. But, there is a 100% safe way to operate and (in your case) open any file of any kind, and that is by using a virtual OS.
Just dual-boot your machine with a Linux OS (I suggest Ubuntu, if a beginner) and then you can run Windows as a virtual machine (on the Linux side). You will never risk any infections or ill will: a virtual OS does not access your hard drive.
I run Windows XP through VirtualBox, on my Ubuntu Linux desktop.
More:
http://www.howtoforge.com/virtualbox_ubuntu
Thanks,
vois2