How to unpack a tar file in Windows

1. Download and install 7zip from [1].
2. Add the directory you installed 7zip into to your path (Start -> Control Panel -> System -> Advanced -> Environment Variables).
3. Move the tar file to the directory you wish to unpack into (usually the tar file will put everything into a directory inside this directory).
4. Open a command prompt, and cd to the directory.
5. Type 7z x filename.tar at the command prompt (where filename.tar is the name of the tar file).