Kindly check the below mentioned link to know the scope of support for password issues on this website:
Why Kioskea doesn't help with system and digital passwords
Before we can help you with any password related issues, it needs to be verified that you are the legitimate owner of the computer. In order to verify this we would need the System Service Tag Number of the computer and the Name or the Registered User of the computer. As this is confidential information I request you to private message me the service tag of the system, registered owners name, address, and primary/alternate contact numbers.
To private message, click my user name Zohaib R
and click "Write a message".
Please allow me some time to find the fix. Kindly wait for reply in the forum after sending the private message.
To know more about Dell Product Support, Drivers & Downloads, Order & Dispatch status -> choose your region US Customers; India Customers. For Dell support videos click Here.