Microsoft Windows 7 Ultimate With SP1 x86/x64 English DVD [MSDN]
x86: 2.38GB | x64: 3.09GB

Take a look at these highlighted features in Windows 7 Ultimate:
    * Get everything Home Premium and Professional offers-plus added security features and the flexibility to work in multiple languages
    * Use BitLocker and BitLocker To Go to better protect your valuable files-even on removable drives such as USB devices
    * Access corporate resources seamlessly when you're on the Internet, without having to initiate a VPN connection*
    * Switch among any of 35 languages as easily as logging off and back on again
    * Back up your files to an external hard drive, secondary hard drive, writable CD or DVD, or to a network location
    * Take advantage of the powerful diagnostics and troubleshooters built into Action Center to resolve many computer problems on your own
    * Watch, pause, and rewind TV or record it to watch whenever and wherever you want (for some Windows Media Center functionality, a TV tuner and additional hardware may be required)

Release Info:
File Name: en_windows_7_ultimate_with_sp1_x64_dvd_618240.iso
Date Published (UTC): 2/16/2011 8:50:21 AM    
Last Updated (UTC): 2/16/2011 8:50:21 AM
SHA1: 1693B6CB50B90D96FC3C04E4329604FEBA88CD51    
ISO/CRC: 8589EE18

File Name: en_windows_7_ultimate_with_sp1_x86_dvd_619077.iso
Date Published (UTC): 2/16/2011 8:50:22 AM    
Last Updated (UTC): 2/16/2011 8:50:22 AM
SHA1: 92C1ADA4FF09C76EC2F1974940624CAB7F822F62    
ISO/CRC: C2966895