Here is  direct link for Dell Command Update.

Remember, this is the driver and BIOS updater for the Dell Latitude E series, Optiplex desktops, and Precision workstation desktops only.  If you have a “consumer grade” Dell, please see the link to your “updater” in the previous post.

Please click on Download File on this page.

http://www.dell.com/support/home/us/en/19/Drivers/DriversDetails?driverId=K82GG

After downloading, install Dell Command Update. Run it once, and then at the end of each month.