Optiplex 990 with Windows 11 24H2 - works like a charme!

Hello from Germany

got an old Optiplex 990, i5 with 8 GB RAM and a 250 GB Samsung Evo SSD.
BIOS was still at A03 and I was not able to update the BIOS when UEFI boot was selected.
Even booting from a USB pendrive with MS-DOS 6.x the BIOS update stopped, even /forceit does not do the trick.
So switching to MBR mode and installing Windows 7 64 bit. Works great. Now I was able to update the BIOS to the latest A24. Switching back to UEFI and installing W11 24H2 from USB pendrive was no problem.
I used the W7 64bit driver cab from DELL to integrate all drivers during setup process,.
Look at the pic, works like a charme!

Next step is to update the BIOS to enable NVMe boot.
Here are the steps: https://www.tachytelic.net/2022/02/dell-optiplex-790-990-nvme/

I did the NVMe more than 100 times and it works great!