Of course, the special price means there are only limited numbers available, and it's a case of first come first served, so you'd better be quick.
As we reported a few weeks ago, you'll be able to get your hands on Windows 7 Home Premium for £49.99, or £99.99 for the Professional version.
You can make your pre-order through companies such as Amazon, Currys, Dixons, Ebuyer and PC World, or alternatively go direct through the Microsoft website.
The OS will eventually land on 22 October, and a pre-order will ensure you're one of the first to get it – not to mention at a discounted price as well. Bargain.