I just tried to update to 2.7.0 again and it is still failing (as expected). I thank everyone who responded but as noted, none of the procedures worked. My Dell is out-of-service so I will need to reinstate my service contract in order to get Dell to take a look at the situation. The cost for service, plus the reinstate fee is way too much for this problem. Therefore, I am not going to do anything at this time and hope that when 2.8.0 comes out that will solve the problem.
There are several other threads for problems upgrading to the latest BIOS 2.7.0 but my situation was a little different so I thought I would create a separate thread. I am running Windows 10 on an XPS 8940 that was brought new around January 2021. I use Dell SA (SupportAssist) to update my system and have had no problems updating at any time since I received my Dell. Yesterday I ran SA and it indicated that there was a new BIOS version available. I tried to install it but when Windows restarted, I got the message that the Firmware update failed, and Windows was rebooting. There was no error message or reason given as to why the update did not work. I then used my computer normally for the day and turned it off last night. This morning I tried again and again got the error. I'm at a loss as to what to do or how to find out what is causing the problem. I am a little hesitant to download the file an apply it manually as I have never done that before and the possible problems that could be caused if something goes wrong. Any help would be appreciated.
XPS 8940, SA failure to install BIOS 2.7.0