Unlock bios & Hard-Drive password service tag,Inspiron 15 N5050, XPS 14 (L401X)

Description

How to unlock bios & Hard-Drive password for all
Dell with only service tag appears
Power on your laptop and wait for the password screen
Enter the wrong password
three times
You will see a screen
with service tag (check photo attached)
You can send the service tag,
that
you wish to unlock to us and we
will send the password back to you.
In order not to have any misunderstanding you can upload the photo where service tag
appears.
After you receive the password
In Laptop: enter a calculated password, then push
Enter key.
Your laptop was unlocked
This password work for all
Dell notebook
with service tag appears
Response time: 5-15 minutes or less during work hours