Originally Posted by
Blueobelisk
I have tons of experience playing with operating systems. I'm student so I had Dream Spark, holy shit the number of downloads I fucked around with, not even including Linux, you'd think I was working for microsoft.
Just get an online copy of W8.1, burn it to your own CD or USB, load it up, and use the product key that came from on your CD case. That product key is what really matters.
W10 is about to be a free upgrade for 7/8/8.1 users anyway and I'm trying to make $$ from that. It's in my best interest if you get this to work.
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...But then microsoft will deactive the preview and he'll have no OS. Unless you want him to buy W10 lol.
i actually have W10 preview on a virtual machine for testing Visual Studio 2015 and it's usable like Korgoth said. I'd still try to download your 8.1 though. prob easier to download the 8.1 than it is to return an open CD case.