There's several links provided by that answer which detail how to recover a Dell laptop from a corrupted BIOS update.

If you own a Dell PC, you might want to be a bit more careful with installing the latest system updates. According to multiple reports on social media, there’s a new BIOS version that could end up ...

On some Dell PCs, including desktops and notebooks, the latest firmware update from the company seems to be causing various issues like BSODs, boot loops, and boot failures, among others. Some of Dell ...