Anyone with experience applying this Feb 20th version 1.9.1 BIOS update on a Dell 7670 or 7770 laptop? I've had bad luck with Dell BIOS updates. They've already bricked 2 of my Dell laptops so I'm not trusting it blindly. 

The BIOS page shows "Fixed the issue where the system cannot boot after the BIOS update.".

If you've tried this update, please share your experience, good or bad.  Thanks!