How can i open my asus laptop when master password disable

do you mean the windows login password or the drive password? if it is happening before windows boots up, it is easy to fix, just open the laptop and short the internal battery for 5 seconds, that will wipe out all system password, but you have to reconfigure the bios settings,

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bios password reset methods depend on model & how its designed,
in laptops cmos battery reset will not remove bios password.
you can reset bios passwords by:
1. Entering master password, if it shows password disabled with Error CODE after failed attemps,

2. shorting bios reset jumper located anywhere near the ram slots in motherboard
3. Re flashing the Bios Chip

start your pc and press f2 or dell... the bios menu open..put the password and then go to security and disable the password and save setting,,,

You need the bios master password from http://www.unlockbiosrecovery.com/Unlock_HP-Compaq_Bios.php for $20 and they guarantee it to work. The bios master password will clear any currently set bios password, I use them often in my work repairing laptops.

HDD password is a security tool which prompt for password during boot.

If you forgot the HDD password then it can be disabled in BIOS settings Incase you can't go into BIOS settings then you need to reseat Jumpers on HDD inside the Tower(On Motherboard, you ned to open it though"
Hope this helps

You need to log into the bios and edit the hdd password...
You can press DEL or F2 key when you power ON the laptop... It will take you to the bios setup...
You can navigate in the bios to reach the hard drive password section and you can set the password as blank...
Once you are done press F10 to save the changes and exit out of it...

If it doesnt works, then you can give a try by restoring the BIOS to its factory defaults(using the restore defaults option in bios) which should turn OFF the Bios HDD security feature...

You can disable bios security passwords by disabling them. Go to bios by pressing F2 at splashscreeen. Find administrative passwords and then disable. You will need to enter the password to disable.

If the password you speak of is not in the bios but the windows. Go to control panel, users and remove password.

The only thing that a bios update would do would update the bio your password info should stay the same maybe your not typing it right try typing with or without cap lock