All Windows PCs and notebooks currently being sold at PC World with a retail price of £399 or above, will receive a free upgrade to Windows Vista Home Premium Edition early next year.

The retailer said from 26 October until 15 March 2007, it will offer two levels of Express Upgrade. A free Express upgrade to Windows Vista Home Premium Edition will be offered to customers buying computers costing £399 and above.

For those who purchase machines costing less than £399, the Windows Vista Home Basic Edition will cost half the recommended retail price. A charge may be made for postage and packaging.

Customers of PC World will also be able to ask store staff or in-store Techguys for advice and guidance on upgrade options. The Techguys provide a range of in-store and home installation services for new PCs and software upgrades and can also be contacted for advice by phone on 0870 240 1004.