Microsoft on Tuesday confirmed the early delivery of Windows 7 in UK before its official launch on Thursday.

Despite retailers previously stating that Microsoft's latest operating system would not be shipped until Oct 21, many people in the UK have received their pre-ordered copy of Windows 7 ahead of the deadline, Telegraph reported.

The move, according to Microsoft, is designed to beat the nationwide postal strikes planned for Thursday and Friday, which could disrupt Royal Mail deliveries across the UK.

Oct. 22 sees both the launch of Windows 7 and a planned postal strike in the UK. In order to minimize the impact on customers, Microsoft has authorized those partners who participated in the pre-order programmed to ship Windows 7 to those customers who pre-ordered it, said Microsoft in a statement.

The retailers are preparing for Thursday's launch of Windows 7 with a range of promotions and special offers, hoping that the release of Microsoft's newest operating system will jumpstart flagging PC sales.

PC World, for example, will open its flagship store in London at midnight on Wednesday for consumers eager to get the new Windows operating system. The first 200 shoppers will get a 50% discount on Windows 7, while those buying a new laptop will receive $150 credit if they trade in their old machine.

The full version of Windows 7 Home Premium is priced at $199, with an upgrade from Vista or XP costing $119. The full version of Windows 7 Professional is $299, with upgrades going for $199. Windows 7 Ultimate is priced at $319, with the upgrade version at $219.