[NAME]  - If you haven't already updated BIOS, you can go only as far as BIOS 1.1.28 now. Dell suddenly removed BIOS 1.1.29 and 1.1.30 from the Support site. My XPS 8930 is running BIOS 1.1.30, after having had 1.1.29, with no visible problems but that doesn't mean BIOS 1.1.29 and 1.1.30 don't have "hidden" issues. If you've you've already gone beyond 1.1.28, you probably should stay where you are and not downgrade back to 1.1.28, at least not or now.  I've asked my Dell tech contacts if they recommend downgrading to 1.1.28 or...
If NO, where do I find BIOS 1.1.26, 1.1.29, etc?
XPS 8930, on BIOS 1.1.24. Can I update directly to 1.1.30?