Microsoft has admitted that although copies of its most recent operating system, Windows 7, are literally flying off the shelves 74% of business related PCs are still using Windows XP, despite the fact that it was released in 2001.

This may be linked to Windows user’s reluctance to upgrade to Windows 7 due to numerous complaints regarding XP’s successor, Windows Vista, which was arguably the worst operating system Microsoft has ever produced.

Microsoft's Corporate VP of Windows, Tammi Reller also admitted to Electonista (http://www.electronista.com/articles/10/07/12/microsoft.admits.most.xps.avoid.both.vista.and.7/) that age may be a factor. The average age of a business computer is currently 4.4 years, older than ever before. This could also attribute towards slow business migration from Windows XP.

Depiste this, Windows 7 is looking more than healthy at present, with over 150 million licenses sold globally since its launch late last year.