How to unlock BIOS Supervisor Password from Lenovo

I demonstrate how to remove/clear BIOS supervisor password from lenovo thinkpad laptops. I have tested this method repeatedly to clear supervisor password of my personal thinkpad W520 and W510. I have been using these laptop since, with absolutely no problem برای خرید قطعات لپ تاپ با کیفیت و قیمت مناسب میتوانید به فروشگاه اینترنتی کالالپ مراجعه فرمایید: www.kalalap.com .