Dell Latitude E6400 XFR (Mid 2008) - Manual (Page 7)

Dell Business Client E-Family Re-Image How-To Guide 7
Supported Operating Systems
The following Microsoft operating systems have been validated for use on
Dell E-Family notebook computers. These operating systems and their
service packs are the latest and most updated releases from Microsoft.
• Microsoft Windows XP Service Pack-3 - 32-Bit
• Microsoft Windows XP Service Pack-3 - 64-Bit
• Vista Service Pack-1 - 32-Bit
• Vista Service Pack-1 - 64-Bit