If you are accessing window live mail and and want to troubleshoot window live mail won't open problems then you can fix this issue by removing window live mail application cache.
For this, click on window logo + R keys simultaneously.
After that run window and type %localappdata%
Click on the OK button.
Double click on Microsoft folder
Microsoft folder > window live mail > open.
Delete .cache extension.
After that, also delete it from the recycle bin.