Please help me to reset the administrator password. The device is M4700 Dell Precision. System Number: B3PGRY1-6FF1.

@Jimfixer, @Cameron Good morning and many thanks for your quick reply. I tried all the said methods and the method as pointed by Jimfixer. The solution which worked for me is amazingly great. I used https://bios-pw.org This worked for me beautifully. NO MONEY. IT IS FREE. I am sure that the same solution will work for other Dell laptops as well. Thanks again for your prompt help.