Find your product key Try to remember how you purchased your Microsoft software, which determines where you need to look to find the product key.

Just because you don't have a promo code at the ready doesn't mean you can't find one before clicking Submit Order. The key is knowing when and where to look.

To protect its products and software, Microsoft strictly regulates the sale and use of Windows software by embedding a validation code, also called a product key, in every copy of Windows. Should ...

A stream key is basically a unique code that connects your streaming software to your Twitch channel.