Precision 5530, BIOS update from Windows locked BIOS?

Hi,

I bought a Precision 5530 and updated my BIOS manually to 1.6.0. Then I was surprised that Windows Updates automatically updated the BIOS to 1.8.1. The problem is I find out that I can't update to 1.10.1 or boot an ISO, because the BIOS was locked and required a password that I've never done. I can't find out what's the problem, and if there a solution to reset the BIOS password?

Thank you