Windows Live Messenger makes it easier than ever to stay connected to the people you care about.

Operating system:

Windows XP with Service Pack 2 (32-bit edition only), Windows Vista (32-bit or 64-bit editions), Windows 7 Beta (32-bit or 64-bit editions), or Windows Server 2008. Note: Windows Live Movie Maker is not supported on Windows XP.

Processor:

1 GHz or higher for Windows Vista; 800 MHz or higher for Windows XP

Memory:

128 MB of RAM (256 MB or more recommended) for Windows XP; 512 MB for Windows Vista

Resolution: Minimum 1024 x 768

The most popular features of MSN Messenger 2009 are:

1- Favorites and Groups
2- Every kind of customization available.
3- Sharing photos made easy.
4- Mobile and Web messenger available.