Try installing it outside of windows on a flash drive.  Most Dell computers manufactured after 2012 have this function and you can confirm by booting the computer to the F12 One Time Boot menu. It's much safer to install BIOS updates outside of windows.
Alienware Aurora R9 Desktop Running Windows 11 Using Alienware Update V 4.7.0 and tells me to download updated BIOS Alienware Aurora R9 System BIOS - 1.0.22 - 8.03 MB - Critical (current bios version is 1.0.20) Downloaded and Update Failed "BIOS update failed as BIOS requires a password. Please remove password on BIOS and retry" I have updated the BIOS a few times and never been asked for password before DELLs solution (at link below) is well outside my PC knowledge  Any advice would be much appreciated.How to Reset or Clear the BIOS Password  
Aurora R9, BIOS 1.0.22 won't install due to password on BIOS