To reset or clear the password that is set inside the BIOS of a Dell desktop, all-in-one, or laptop:
Browse to the Dell Manuals website.
Identify your Dell product
Click Download & Install SupportAssist to auto-detect your Dell product. Follow the on-screen instructions to install Dell SupportAssist. For more information, see the Dell knowledge base article Dell SupportAssist (formerly Dell System Detect): Overview and Common Questions.
Or, enter the Service Tag, Express Service Code, or the Serial number of the Dell product and click Search.
Or, click Browse all products to manually select your Dell product from the catalog.
Locate the service manual under the Manuals and Documents section.
Click View PDF or View Page next to the service manual of the Dell computer.
Follow the instructions under the Deleting or changing an existing system setup password section.
Greeting,
Rachel Gomez