Burger King, Microsoft Introduce Windows 7 Whopper

In one of the oddest corporate pairings, Microsoft and Burger King have joined forces in Japan to unveil the "Windows 7 Whopper."

The promotion, tied to the release of Microsoft Windows 7 operating system on Thursday, is a Whopper with seven beef patties that costs ¥777 ($8.50). The burger stands 5 inches tall, but will only be available for seven days.

Engadget reported that the small print stated that in fact only the first 30 customers each day will get the burger at ¥777, the price will then go up to ¥1,450 ($17.10) for the privilege.

Tech blog Electronista noted that the stunt is part of Microsoft's effort to turn around its public image. The company also launched a giveaway of product for every resident of the Dutch village of Zevenhuizen ("Seven Houses") and decorated parts of the Spanish village Sietes ("Sevens") in Windows-themed colors .

Microsoft is also promoting the release of Windows 7 with house parties around the world. Gizmodo got their hands on one of the party kits . And Microsoft also opened its first retail shop in Scottsdale, Ariz .

Last year Burger King introduced a $200 burger , setting a new record as the world's most expensive burger, it was available at just one restaurant in West London, England, once a week.