There's this on Google:  [URL]#ip=1  Best bet is to reload with DVD.  I've never had any luck with blue screens and any of the options they give other than to reload.  I don't know if it gave you any options or not.  Hopefully all important files were already backed up outside of PC. BIOS should be on UEFI and AHCI when loading.  You can try other settings if you still want to attempt to recover, like Legacy, but I don't think that'll bring it back.  Screengrabs below: [IMAGE] [IMAGE] Do not choose "Disabled" for SATA Operation. When loading from a DVD, when it asks for a product key, it should let you choose "I do not have a product key," and it'll continue loading.  You'll still have to activate online.  Product key should already be embedded in BIOS. It's a good time to replace size 2032 CMOS battery if it's 5+ years old. It doesn't hurt to load on a new HDD/SSD in case it was a failure there.  If you were using an HDD, an SSD will speed up certain things up nicely. If you create Windows media installation, like make a bootable flash drive or DVD, you'd have to do that on another PC.
When turning on pc went directly into blue screen with a boot configuration error. It did reboot and I was able to F12 into the Bios settings, what should I be looking for? Why is the configuration all of a sudden not recognized? TIA
Optiplex 790 boot configuration error 0xc000014c