Dell Latitude E4310 500GB 2.5" 7200rpm SATA Laptop Hard Drive with Caddy, Windows 7 Professional 64-Bit and Drivers Installed Preinstalled Operating System: Windows 7 Professional 64-Bit Most Common Drivers Installed, Alternative Drivers Saved on HD Buyer must have a valid Product Key for the exact version of the installed operating system Comes with instructions on how to install hard drive and activate with your product key Made for the Dell Latitude E4310 laptop only. SATA Operation Mode - RAID