
Online retailer Amazon.co.uk said the operating system was now its 'biggest grossing pre-order product of all time', having overtaken the likes of Harry Potter and the Deathly Hallows and Nintendo Wii.
Sales may have been bumped by the well-received Beta version, which had favourable reviews from various technology websites.
The latest features include a redesigned taskbar with less clutter, a tool showing the status of connected devices including cameras and mobile phones, and quicker, slicker previews of an application's open windows.
James Gorbold, deputy editor of Custom PC, said: 'It's a massive step forward from Vista.'
He said Vista was annoying frustrating, and came at too high a price while Windows 7 'sorts out these problems and adds lots of useful features'.
'It's a lot faster and much more responsive,' he said.
The versions PC users are most likely to see for sale are the Home Premium and Professional editions. A Home Premium software upgrade will cost £79.99 until 1 January 2010, at which point it will go up to £99.99. The full version costs £149.99. (Daily Mail)