I bought a hp computer and need password unlock

This video shows you what to do if you forget your computer password:

You can reset the Bios pasword by switching an insade jumper to on, look at Google how you can do it yourself

There should be a factory procedure for this. Anybody that can help You need to know first the brand and exact model of your computer to search for the right procedure.

Once you assign a password to your HP computer's BIOS configuration utility, you will need to enter that password every time you attempt to access the BIOS.
If you forget this password, don't fret there is still a way to unlock your BIOS without actually knowing the original user defined password.
This involves using a "backdoor" password, which is something that is installed onto your BIOS at the factory level that never changes.

Turn on your HP computer.
Press "F2" to load your HP BIOS access screen.
A password prompt will load on your monitor.
Type "merlin" into the password field (with no quotes) and hit your "Enter" keyboard key to unlock your HP BIOS password.

To bypass or reset the Windows password on HP mini, you need to download and install a Windows password recovery tool. Windows Password Unlocker can help you reset forgotten Windows local administrator, domain administrator and other user account passwords on Windows 8/7/Vista/XP/2008/ 2003/2000. No damage to computer data and settings.

You cannot do anything about tha p/w. Format hard disk and reload operating system and leave administrator without a password.

The school cannot 'block' the computer.If you are asking how to get round a password, so you can use a stolen computer, you are on the wrong site.That is a criminal activity. You would be far better contacting the school and telling them you bought it innocently.
If you bought stolen property you should be trying to get your money back from the seller. Apart from that, are there no police where you live? They are the ones that are interested in people that sell stolen property.

You can remove or change the Window's User oradministrator's password. You need access to a computer with Internet access todownload the Hiren's Boot CD and burn it onto a CD.Then insert this CD into the laptop/computer and boot upthe laptop/computer with the Hiren's CD and follow the instructions.There are very useful utilities CD and it a Linux boot CDwhich contains quite a lot of Utility programs including a password removalprogram.Click on one of these links todownload HIREN'S BOOTCD :-http://www.hirensbootcd.net/ http://67.20.82.163/

Give Unlockbiosrecovery.com a try and they can unlock your bios for only $20 and they guarantee it. Great service and fast.

Inside of the computer you will see a small yellow(likely) button. Press and hold for about 5-7 seconds and then try, This is the CMOS reset button. If that does not work you can always remove the battery for a few seconds and that will work. This will also reset any bios settings you have saved to default.