I've bought some friends this type of key. Sometimes you have to call Microsoft and they give you a different key (via an automated system). That's what I've

I've bought some friends this type of key. Sometimes you have to call Microsoft and they give you a different key (via an automated system). That's what I've had to do each time I've used this type of key. (I learned this from changing too much hardware at once on a retail key. Completely automated phone number. Solves the problem 100% of the time. I don't know what they're up to or what the business model is.)