http://www.burgerkingjapan.co.jp/news/win7.php

Only on offer for 7 days. First 30 people each day get it for ¥777 then it goes up to ¥1450.

Tbh Id gladly pay £10 for the priviledge of eating one of those, I think it would truly be a once in a lifetime thing. Isnt it something like 700g of meat?

I'd have a go and would probably win unfortunately.

http://eatingtheroad.wordpress.com/2009/10/24/windows-7-burger-unlocked-hacked/

QuoteFrom the remaining burger you must discard not only the bottom bun but also the extra patty. Although this may seem unnecessary, omitting this crucial step will not produce a validated version of a Windows 7 Burger and may not be compatible with your system (this could result in possible system crashes as the amount of calories, sodium and fat could overheat your machine).