Windows Vista operating system is proving far less popular with PC buyers than Windows XP.
Latest figures from Microsoft show that more than 100 million copies of Windows Vista have been sold since the OS launched last January. However, that means that the OS was only on board about 40 percent of the PCs that shipped in 2007.
Five years ago, Windows XP shipped 89 million copies during its first full year and captured about 67 per cent of the new PC market during its first year.
According to InformationWeek, more than 30 percent of corporate desktop managers have no plans to upgrade their company's PCs to Vista - ever.