It seems that your HP Machine's BIOS is password protected. You can only get the password removed by either entering a correct password or removing the CMOS battery.
The CMOS battery is located inside the system under the HDD. You will have to open the Cover of the System. The battery is wrapped in a insulated plastic cover.
It will be similar to this image:
If you are able to access and remove the battery, Keep it removed for atleast 5 - 15 minutes and then replace it. This will reset the BIOS password and you should be able to move into the BIOS (setup screen).
Hope you find this information helpful. Please feel free to contact for any further assistance.
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i forget my bios password in my acer laptop, how can solve this problem
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