Microsoft no longer provides stand-alone installers for Windows Live for direct download. You have to download it and other Live products through Windows Live Installer.

In Windows Vista, the Live installers were stored in C:\ Program Files\ Common Files\ WindowsLiveInstaller\ MsiSources . Windows Vista users may want to see this.

However in Windows 7 they are stored in separate folders.

Uncheck ‘Hide protected OS files‘ from Folder Options, to be able to see this folder.

Once Windows Live Installer has finished downloading and installing Messenger, browse to

C:\Program Files\Common Files\Windows Live\.cache

assuming your Windows 7 has been installed on C drive.

In the .cache folder you will see many sub-folders. Each folder contains a Live installer. The installers can be easily be identified by their names.

For example:
64e48eb91c9b118 folder contains Messenger
fd79e28c1c9b132 folder contains Mail

Backup the one’s you want.

If you have liked this post, you might want to check out some more, on topics like Live, Mail, Messenger.