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The C720 is a low cost Acer ChromeOS based Chromebook. Released 2014 successor to the C710.

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I open the laptop it will ask to password

When o open my laptop its will ask bios password so how I can closed the password and how can create further

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Hi Raguraman!

This may have been a cooperate laptop that was issued to the education sector.

However! There is a way around the problem. If you press (Ctrl +d) twice and enter into developer mode. The chromebook will refresh the system back to how it was when new, taking to the (welcome) splash screen. DO_NOT_UNPLUG the mains or switch it off, otherwise this will corrupt the system, rendering the machine SERVICEABLE! You will need to press (Ctrl + Alt + Shift + r) once in the welcome screen to delete any BIOS passwords, the system will prompt you again, as it goes through a full power-wash, press the continue key, and after a few minutes the Chromebook will reset…

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Raguraman さん、ありがとうございました!
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