If you have not downloaded this Windows 7 Harvest theme from Microsoft, you definitely want to to check it out. Although it was released last year, I think you should download it, as the theme contains some 18 high resolution desktop wallpapers of exceptional quality.
Enjoy the bounty of the harvest with this free Thanksgiving theme for Windows 7.
Click here to visit its download page. It's a 14.5 MB download. I trust you will enjoy its various flavors.
If you are not using Windows 7 Home Premium, Professional, Enterprise, or Ultimate editions,, you can always extract the wallpapers and use them. Go here to learn how to create your own Windows 7 themes.
Enjoy!