Firmware update from 01.00.07 to 1.2.0 is not permitted. The system is configured to block firmware updates to previous revisions
Sound familiar? I couldn’t install any Dell firmware updates for my XPS 15 due to a rogue prefix ‘0’ in the default factory firmware version ‘01.00.07’ causing the Dell BIOS update tool to think it’s downgrading itself. 😐
Here’s how to fix it.
- Restart your computer
- From the DELL logo press the ESC key until the BIOS Settings prompt shows
- Open the Maintenance > Firmware Downgrade tab
- Remove the check on Do not allow firmware downgrade
- Click Apply and then exit BIOS
- Run the firmware upgrade
That’s it!