Even though Windows 7 doesn't launch until 22 October, you can lay down just £49.99 for a copy of Home Premium and £99.99 for Professional. That's a large cut from the launch RRPs of £149.99 and £219.99, respectively.
The pre-orders are via retail partners such as Amazon, Argos and Comet.
On the UK pre-order page Microsoft is at pains to point out the lack of browser for EU installs. "Windows 7 E does not come with a browser in the UK and also requires a clean install... You will need to back up all your files before starting and you will need to have a browser such as Internet Explorer 8 or a browser from another software manufacturer saved to a CD/DVD or external storage device before starting."
It's been a busy couple of days for Microsoft, who also announced a free web-based version of Microsoft Office, Windows Azure and a music-streaming service to rival Spotify. Its Worldwide Partner Conference is currently taking place in the US.
You'll need a PC with these minimum recommended specifications to run Windows 7
- 1GHz or faster 32-bit (x86) or 64-bit (x64) processor
- 1GB RAM (32-bit) / 2GB RAM (64-bit)
- 16GB available disk space (32-bit) / 20GB (64-bit)
- DirectX 9 graphics processor with WDDM 1.0 or higher driver
You can also use the Windows 7 Upgrade Advisor to check if your system is compatible.
Sign up for Black Friday email alerts!
Get the hottest deals available in your inbox plus news, reviews, opinion, analysis and more from the TechRadar team.
Dan (Twitter, Google+) is TechRadar's Former Deputy Editor and is now in charge at our sister site T3.com. Covering all things computing, internet and mobile he's a seasoned regular at major tech shows such as CES, IFA and Mobile World Congress. Dan has also been a tech expert for many outlets including BBC Radio 4, 5Live and the World Service, The Sun and ITV News.