How to open .webarchive file

Webarchive files are created using MAC but can also be opened in MS Windows.

1. Download and install Safari browser for Windows here.
2. Right click .webarchive file and open with Safari browser.

How to open .eml files

1. Right click file to rename
2. Rename extension name to .mht
3. The file may now be opened using Internet Explorer.

More info from the source here.