Interesting piece of copy in this Windows Vista dialog box. Basically it’s saying:

1. Type your product key in now.
2. But you don’t have to.
3. But if you don’t, you could loose everything.
4. And you might have to buy another copy of Vista.
5. So on second thoughts, you probably should enter your product key in now after all.

Luckily, due to the way people scan-read when using a computer, few will actually read this paragraph and most will skip ahead to fill in their product key without even noticing the content.

Thanks to Peter Otto for picking up on this.