A video of the performance has been uploaded onto , showing Microsoft staff breaking into a hand-clapping dance along to 'I Gotta Feeling', by the Black Eyed Peas.
The complete and utter indifference of customers in the store can be clearly noted at around 1:40, however towards the end of the video it shows some less cynical customers joining in.
Some users have placed amusing comments under the video, including one person who wrote: "Microsoft, This is pathetic. GET A MAC!"
The flash mob debacle follows the worldwide mocking that was dished out to a campaign launched by Microsoft in the run up to the launch of Windows 7, to celebrate the momentous event.
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