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The petition was submitted by Paul Milne and people have until 20 April to add their names to the petition. He said that there was a 'huge difference in the price that people in the US and the UK are paying for Windows Vista.'

'I can see no reason for there to be such a huge difference in prices between the UK and the US other than Microsoft's belief that the UK customers will pay more than their US counterparts,' said Milne.

Milne cited the price of a full copy of Vista Ultimate in the UK as being £350, whereas in the US Milne said the price would be £195. 'The US version of Vista is exactly the same as the UK version,' he said.

The e-petitions site has already attracted significant interest with nearly two million people signing a petition against road pricing.