Off late one of the biggest problem with Windows Live Writer was that it had sort of (you had to lower your security settings in Google account to make Windows Live Writer work) stopped working with Blogger. Google had moved onto newer standard of OAuth and Windows Live Writer was maintained to keep up with newer standards. Now with Open Live Writer that issue is sorted out. It has been updated to work with latest Google standards.
More details on Open Live Writer can be found at Scott Hanselman’s Blog.
PS: This post is using Open Live Writer after I turned off “Allow less secure apps” option in Google Account.