Dell Latitude D830 320GB 2.5" 7200rpm SATA Hard Drive with Caddy, Windows 7 Professional 32-Bit and Drivers Installed Preinstalled Operating System: Windows 7 Professional 32-Bit Comes with instructions on how to install hard drive and activate with your product key Most Common Drivers Installed, Alternative Drivers Saved on HD Made for the Dell Latitude D830 laptop only. Buyer must have a Product Key for the installed operating system