Microsoft opens Windows 8 for pre-orders -

Software giant Microsoft opened its Windows 8 operating system for pre-orders and set the price for an upgrade to the full version of the software at $70 for a DVD pack.

If you do not want a hard copy of the OS it will be possible to download the OS for $40 in October 26. That particular offer price will expire at the end of January and is designed to encourage early adopters.

The cheaper upgrade price applies to machines running Windows XP, Vista and Windows 7.

Microsoft said that the software can be bought at Microsoft's own stores, Amazon.com, Best Buy, Staples and elsewhere. So far though there is no news about how much it will cost to upgrade the full software to install from scratch. Nor does Microsoft say where you can buy it from. If you tried to do that with Windows 7 it could set you back $200.

If you bought a Windows 7 PC between June 2 and the end of January 2013 will be able to get an upgrade to Windows 8 Pro for $15.

Vole announced that PC makers such as Acer, Asustek, Dell, HP, Samsung and Sony were also now taking pre-orders for machines with Windows 8 pre-installed.

However there was no mention of Microsoft's Surface tablet PC, which is expected on the market at the same time as Windows 8.