Check the SATA Mode in BIOS Setup (reboot and press F2). Change it to AHCI if it's set to ATA. See page 160, here. Be sure to save the change before exiting setup.
Sorry that didn't help...
Look at Boot Mode in BIOS setup and try changing it to one of the other options, if any are available.
Others have had similar problems on this model so you might search these forums to see if a specific fix has been posted.
After an almost two hours phone call with DELL (during which they very openly admitted that they have very little to no knowledge regarding Windows 8) it became obvious that DELL would be unable to provide any advice to fix this issue.
UPS will pick up the PC next week and DELL will refund the entire Euros 1.960 that I paid.
A brief but nevertheless very unpleasant one time experience as a DELL customer.
Verry sorry to hear that....
It's possible the BIOS update destroyed the motherboard. Won't they send you another system with the latest version of BIOS already installed?
If you want to give it one more go, try clearing BIOS settings by the procedure on page 164 of the manual, and then set SATA mode to AHCI.
Hope you find another system that meets your expectations.
I had the same problem. My 2 hour old machine would not boot in to windows after I updated from A06 to A09. I ended up getting it working by entering the bios, and selecting defaults (F9 from initial bios screen, then F10 save). This allowed me to boot back in to windows 8. Hope this helps :-)