More than 500 VARs across Europe, including 85 from the UK, took part in Context's Linux survey in August. The results were published last week.
They showed that 30 per cent of VARs questioned are actively selling Linux-based computers. A total of 57 per cent said they planned to increase Linux
The findings back last week's Vanson Bourne survey of 200 IT managers across the UK, which found two in five had switched from Windows to Linux.
Jeremy Davies, senior partner at Context, said: "If I was Microsoft I would be worried about Linux.