I came to know that many people buying more than one product key for Windows 8. What's the use of getting more Keys? Suppose If I purchase only one product key, OS available for limited time or Life time?
The OS is available for a lifetime. If you are a normal user then 1 key per computer you own will be enough for daily use. But for IT departments they require more than 1 as they have to install Windows 8 for the corporation. (Meaning at least 100 computers need their own key)
If you want the Media Center pack add on for Windows 8 Pro, you will need a key for that, get one for free here-limited time offer