Power-on password to reset

https://support.hp.com/bg-en/product/Compaq-CQ2000-Desktop-PC-series/3942830/model/3965327/document/c01728332

These steps may not work for you, and without further information, it is difficult to make useful suggestions.

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https://support.hp.com/bg-en/product/Compaq-CQ2000-Desktop-PC-series/3942830/model/3965327/document/c01728332

Here are some combinations to reset the device:
I. Volume Up + Home + Power,
II. Home + Power,
III. Volume Up + Volume Down + Power,
IV. Volume Up + Camera,
V. Volume Up + Volume Down + Power.

Lost Windows password:

• Log in as Administrator (try safe mode if you don't see Administrator).
  
• Login as other user (if other user is availible) and manage users.
  
• Reformat computer.
  
• Use 3rd party software to remove password. Like http://www.top-password.com/reset-windows-password.html
  

try this: Make sure the battery for the notebook is out in step 8


the procedure to reset the CMOS/BIOS is in the maintenance and service guide on page 46.

Follow these steps to clear the password:
NOTE: These steps also clear CMOS.
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and
then unplugging the AC adapter from the computer.
4. Remove the battery (see Battery on page 48).
5. Remove the real-time clock (RTC) battery (see RTC battery on page 68).
6. Wait approximately 30 minutes.
7. Replace the RTC battery and reassemble the computer.
8. Connect AC power to the computer. Do not reinsert any batteries at this time.
9. Turn on the computer.
All passwords and all CMOS settings have been cleared.

HP Spare Key can be used to reset BIOS password. It is provided by HP Corporation. So when you forgot BIOS password on HP computer, just download it and get perfect BIOS password reset.
How to reset HP bios password with Spare Key or other ways?

Please refer to reset HP Elitebook password. In this passage, you also can learn how to reset Windows administrator password easily.
http://www.isunshare.com/windows-7-password/reset-hp-elitebook-password.html

Hi,
It seems to be BIOS password, if you don't remember or don't have the BIOS password you have to reset the password by opening your CPU cover and removing the CMOS coin battery, this will reset the BIOS password but dont forget to return back the battery and start using your PC.

Regards,
JJ

take off the battery and turn on computer then turn off , back the battery to its place again and turn your computer on , it will be reset


if you see that is helpful please don't forget to vote me
best regards

Hi, try pressing the ESC button or Del in some machines; do this during bootup and you can select start in safe mode. From here you can go to control panel and reset your password.
Hope this helps

windows password? if so boot to safe mode and see if the administrator has been password protected if not delete the protected account create your own ans you should be fine if not reload windows :(

there are several ways on which you can reset the cmos in your pc, most common ways are removing the battery (like what you did) or doing a short circuit on the battery or reset pins. However there are some manufacturers now that use a different method, I had a dell PC before where the reset pins are already shorted, to reset it, I had to remove the jumper, power the device for 10sec, power it off then put the jumper back, kinda odd but I guess that how dell wants it, you can try that method as well. there are some that requires a key or before it could be reset like what I heard on some HP brand computers, the use has to call HP, then they ask for the serial or something then give ot generate a key. The best advise is to consult the documentation or vendor of your laptop for details on how to get your reset your laptop.

cheers,