How many usable product keys does vista come with?

[nonxcarbonx]

I'd like to use my friend's but I don't know how many times you can activate a key. My guess is one, but hopefully I wrong.

 

[btk1w1]

Who knows?

But by doing this you run the risk of both of you ending up with a WGA notification alerting of counterfeit, and with him having to explain to Microsoft why he is the legitimate key holder and why there are 2 pcs using it.

 

[ohiou_grad_06]

No doubt. With Windows 7 a few days off, wait and buy a copy of that. If you are in college, I think you can buy it for like 30 bucks.