It's not officially supported any more.
https://answers.microsoft.com/en-us/windowslive/forum/livemail-wlinstall/windows-live-mail-2012-installation-issue/930ba321-811d-4099-877a-f992539b3c65 might help.
If not, I'm afraid that changing to another e-mail program is the solution. Let me recommend Thunderbird.
I have just bought a HP Spectre x360 laptop running Windows 10 and the first thing I'm trying to get set up is my email. I've been using Windows Live Mail for a long time now and I'm happy with it so if possible I'd like to keep using it. I'm 64 and don't like change! I can't understand why they took this out of Windows 10 as it's a brilliant email program. Anyway I have been checking the web and found that a lot of people have successfully installed Live Mail on their Windows 10 systems but every time I try I get a message saying the installation has failed and the following error code; Error; 0x800c0006
Am I doing something wrong here? Is there any way I can get Live Mail to install on my system?