Made a big mistake installing the A12 bios. My computer is very sluggish and performance is terrible now. It won't let me reinstall the A11 bios as that feature to downgrade has been removed in the A12 bios. Bad move Dell. There's nothing in the bios now since A12 was installed to allow me to return to the A11 or allow it to be reinstalled. Anyone know a way of fixing this boat anchor and get the A11 bios back?