I don't have a DELL XPS model but I imagine the replies would be similar for my DELL Optiplex model. I posed this question a while ago and contrary to what you suggested, someone replied to apply each upgrade available in order. So that's another good reason to "let sleeping dogs lie"! Thanks for your followups. Dan
Hi! For those of you who have gone through the DELL BIOS upgrade, please share your experience with me. I have a 10-year-old DELL which is working just fine but I periodically receive notices from DELL that a BIOS upgrade is available. I have about 10 of these notices so do you suggest applying them one by one, or are they cumulative so that if I apply just the last one it will include all previous ones? I'm used to the old days when flashing the BIOS was a real big deal and if not done properly it could brick your PC. Now, it seems like all I have to do is  is run the 'exe' file that DELL provides. Do I have that right? Thanks in advance to all who reply.Dan
performing a basic DELL BIOS update