Things always seem over the top in Japan, from the cartoons to camcorders and cell phones. It's almost no surprise that Microsoft has partnered with Burger King to sell a gigantic hamburger there.

The Windows 7 Whopper consist of seven stacked beef patties that measure over 5 inches in height, and the whole thing costs an appropriate ¥777 (or $8.55). It's available for seven days only, completing the run of sevens.

Microsoft is hoping for a fresh start with Windows 7, after a poor reception for the Vista, the previous version of the software that runs most of the world's personal computers.

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Microsoft has a reputation for quirky ad campaigns, most recently a strange series featuring Bill Gates and comedian Jerry Seinfeld. This particular ad may leave a bad taste in your mouth, as well: After all, the company has been criticized for releasing top-heavy, bloated operating systems. A blog on the Computerworld website theorizes that "this could be one of its worst promotional ideas ever."

The site notes that the Windows 7 Whopper weighs in with about 1,000 calories, and likely packs enough cholesterol to require immediate surgery for anyone foolhardy enough to try eating one.