Windows Live Mail

Since yesterday I can't open my Windows Live Mail 2012. When I open it a box pops up stating: "The server you connect to using a certificate, which could not be verified." I've talked to my internet provider and they said that the problem might be "Windows Live Mail stops responding or fails to start after you install KB2454826". So I went to this Windows page and to the "Fix it for me" section and when I press the Download button the following box pops up "This Microsoft Fix It does not apply to the operating system or the software version you are using." I'm using Windows 10. Any help is much appreciated! Many thanks. Paul from Sweden.