Clearing CMOS settings
1. Ensure the computer has been powered down.
2. Plug the power adapter into the computer and ensure that there is power supplied to the computer via the adapter.
3. Press and hold the power button for 25 seconds to perform Real Time Clock (RTC) battery reset.
4. Release the power button.
Clearing BIOS (System Setup) and System passwords
Contact Dell technical support to clear the forgotten passwords. For more information, see www.dell.com/contactdell.
System setup
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