Sites like bios-pw.org may generate unlock codes based on your 11-character system number [2]. On many Dell systems, you must hold Ctrl and press Enter when submitting these generated codes for them to work [2].
Enter an incorrect password 3 times to trigger a "System Number" or "Service Tag" error code on the screen [8]. dell latitude 5520 bios password reset
Sites like bios-pw.org may generate unlock codes based on your 11-character system number [2]. On many Dell systems, you must hold Ctrl and press Enter when submitting these generated codes for them to work [2].
Enter an incorrect password 3 times to trigger a "System Number" or "Service Tag" error code on the screen [8].