Switch off your DM800
switch it on again and take note of boot loader on the Dream screen (1 second)

-Switch off your DM800
-Plug in power while pushing front silver button.PWait until you see ***stop*** on the dream screen
-Take note of the IP address shown on the little screen.
-Do not switch dream off
-Connect PC (or notebook) to Dreambox
-Start any browser and enter the IP address that you have copied in the browser.
-A special screen appears for flashing the dream image on your box.
-Go to the bottom of the browser page
-Select the software location on your computer. It should be nfi format. (make sure that it is the same version as your boot loader)
-Click on flash and wait few minutes for loading to finish.