Windows 7 isn't being formally released until October, but if you can't wait to move on from Vista or XP then now's the time to strike. Microsoft is releasing a limited number of copies at vastly reduced prices if you pre-order one now.

The pre-orders are available from many stores, with Windows 7 Home Premium E selling for around £50 and Windows 7 Professional E selling for around £100. If you want a copy of Home Premium, however, click the jump - we've found the store offering the biggest discount, which brings it down to a fantastic price of £45 per copy.