Many Windows Live Writer users blogging to Blogger faced logging issues. I also tested Windows Live Writer 2012 both on Windows 8.1 and Windows 10 and confirmed that it does not connect to Blogger any more. Apparently, the reason is because Google has changed it’s old authentication system (Read here). Google Blogger now uses the more modern OAuth 2.
Attempt to setup a blog on Windows LiveWriter on Windows 8.1 and Windows 10 both failed and displays the following error:
On Windows 8.1:
“The blog account could not be accessed using the specified username and password”
On Windows 10:
“The username and password is incorrect. Please try again”.
Windows Live Writer will no longer work with Blogger as Google has implemented a new authentication system - OAuth2. Microsoft's Employee Scott Hanselman's post says:
Google runs the excellent Blogger blog service. We've worked with the Blogger Team within Google on this project, and they've been kind enough to keep an older authentication endpoint running for many months while we work on Open Live Writer. Soon, Google and Blogger will finally shut down this older authentication system. Blogger will use the more modern OAuth 2 and Open Live Writer will be updated to support OAuth 2.So, if you are a Blogger user using Windows Live Writer, then you need to migrate to Open Live Writer, which is as an Open Source fork of Windows Live Writer. See here how to install and setup Open Live Writer for Google Blogger service.