I am successfully running Windows 11, 25H2 on three of my Optiplex 9020 MT desktops.  I use the built-in Intel RST RAID with pairs of Samsung SSDs.  Performance is just fine and the only negative is that I have to download the ISO for major version upgrades.  The upcoming UEFI cert change has me concerned.  I have used the registry setting and PowerShell command to download the new 2026 UEFI cert - registry shows it as available - but I am concerned that without a firmware upgrade it won't actually be used.  I suspect since this Optiplex has been classified as end-of-life, there will be no help from Dell.  Does anyone else run this configuration and have any concerns or solutions?  Thanks!!