Microsoft is offering Windows XP and Windows Vista users a special pre-order upgrade oppertunity to upgrade at a 50% discount.  Users can purchase Windows 7 Home Premium Upgrade for $49 and $99 for the Windows 7 Pro upgrade edition. If you want Windows 7 hurry and pre-order now.  The offer is only valid for a few weeks in each country.  Once its over you will have to pay the full upgrade price of $119.99 for Home Premium and $199.99 for Professional.

Pre-order Windows 7 Home Premium from Amazon.com

Pre-order Windows 7 Professional from Amazon.com

When you checkout at Amazon select "Release Day Delivery" to have your copy delivered on October 22nd.

This program begins June 26th in the U.S., Canada and Japan. The offer ends July 11th in the U.S. and Canada and on July 5th for Japan or while supplies last. Customers in the UK, France and Germany, can pre-order their copy of Windows 7 starting July 15th and will run until August 14th (or supplies last) to ensure folks don’t miss out on this. Act fast if you want to be the first in line to get Windows 7 at this screaming deal! Note: The special low pre-order price will vary per country.

Read more on the Windows Team Blog