Hi all, Looks like we may finally have a fix for this problem. A new update of Alienware Command Centre 4.5.9.0,A00 looks like it's addressed the issue. Early days but I've shut down a few times now and turned off the mains power and after switching it back on I now have to press the machine power button to power up. Ill wait a few days for any feedback before saying this is closed.
I recently had issues with a black screen after a reboot which only allowed me to boot up again if I shut down and turned the mains power off then on again but that was finally fixed after resetting the CMOS, replacing the CMOS battery and reseating the GPU and memory. All has been going well for a few weeks until last week when the PC started booting up when I switch on the mains power before I touch the power button. It still runs OK and appears to be stable and passes all diagnostics. It's running BIOS 2.2.2 and I've now upgraded to Windows 11. I've tried the following solution without any change: Ensured all updates have been completed. Checked BIOS power is set to off after power outage reboot. Changed location of power cable from power strip to wall socket. The power button operates normally, quick press for shutdown and long press for emergency shutdown. Power button operates normally if I shut down and then press to turn back on again without cycling mains power. Anyone got any ideas on this one? Doesn't affect the operation but shouldn't be doing it! Thanks, Rod
Aurora R10, boots after switching on mains power without touching the power 
button.