Where as Microsoft Bing search engine is getting popularity because of its performance, on the other side so many people likes a lot, the daily changed wallpapers of Bing which are also based on your regional settings. So, if you want to download the Bing wallpaper daily then use BingDownloader application to do that. This is a free small 10KB size app and works very well without any settings to download Bing wallpaper automatically.
So, what you have to do now? just download BingDownloader and run its exe file, it creates a folder on your desktop and downloads daily wallpapers images directly from bing.com and stores in that folder. After that you can use those wallpapers as you want.
Keep one thing in mind that you have to run BingDownloader .exe file daily, when you start your computer then it becomes active to capture Bing’s wallpaper automatically. BingDownloader works with .NET Framework 3.5.