Bios admin locked

[JohnnyG01]

I am trying to enter bios on hp 620 but keeps locking out after third attempt, no code given.

[REO51ST]

Welcome to the HP Support Community   @JohnnyG01 

For that model you will need to contact HP in your region and they should be able to send you a customized SMC.bin file which you can use at boot to reset the password.

Phone >> http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html

When talking to the HP rep ask them to escalate your service request.

Just to note:

Do not try removing the RTC battery.  It will not remove the password, but it may reset the clock - as SMC files are time coded, a large disparity between the system clock and the time encoded in the SMC  will cause it to fail.

REO

[JohnnyG01]

Hello and good day, many thanks for your response, to put you in the picture, i have had this machine for a couple of years, and don't ever remember setting a password. I recently brought it out of storage intending to give it to someone for their studies at school. but when i switched it on it's asking for the admin password. I downloaded the bin file from hp support (68PVLBIN) and put it on a usb stick, but after pressing esc at startup and F9 for boot it goes straight back to admin password. Regrettably i have already removed cmos battery and after an hour put it back but situation remains the same. I am pulling what little hair i have remaing out.. any ideas, thanx in advance.

regards

john