LONDON, ENGLAND - OCTOBER 21:  A computer store employee stacks copies of Microsoft's new operating system 'Windows 7' ahead of its official launch at midnight tonight on October 21, 2009 in London, England. Microsoft's much-anticipated version of its Windows operating system for PCs aims to eradicate many of the problems associated with its predecessor 'Vista'. Getty Images logo Getty Images 1 month ago

LONDON, ENGLAND - OCTOBER 21: A computer store employee stacks copies of Microsoft's new operating system 'Windows 7' ahead of its official launch at midnight tonight on October 21, 2009 in London, England. Microsoft's much-anticipated version of its Windows operating system for PCs aims to eradicate many of the problems associated with its predecessor 'Vista'.