Dell Bios Password Reset Tool Download Verified Page

Dell builds a backdoor into its firmware for technician use. When a system is locked, it generates an encrypted hash based on your unique Service Tag. Password generation tools reverse-engineer this hash to calculate the original factory master password. Popular Open-Source and Web Tools

Gently pry the battery out of its slot (or unplug its wire connector).

files claiming to reset BIOS passwords from within Windows are often malware or bloatware

If you want, I can instead:

Use official Dell resources