I have acer laptop. wanted to set user password but i went to system setup and the computer locked, requiring primary master Hitachi HTS545025B9ALock please help!

What OS are you using?

Reinstall windows or use one of the many tools out there that let you boot into windows without having windows. Then you can change the password and log in with the new one.

Here is a post about how to unlock Acer Aspire with Windows Password Recovery Tool 3.0, you need it. Don't waste time at unnecessary help.
http://www.windowspasswordsrecovery.com/lost-acer-windows7-password.htm

How Do I Change the Primary Master HDD User Password?

Prior to loading an operating system, your computer will first execute the BIOS program. The BIOS has an extra password feature, called the hard disk drive (HDD) user password, that can't be bypassed and provides a layer of defense to keep your data secure. To change an existing HDD user password you will have to load the BIOS menu, which is only accessible during the computer's operating system reboot procedure.

Instructions

1. Close any windows that are currently open on your computer. Eject any discs inserted into the optical drive and disconnect any peripheral USB devices.

2. Open the "Start" menu and select "Shut Down." Turn on your computer once the operating system finishes shutting down.

3. Press the key your computer uses to load the BIOS menu. For example, with Dell computers tap "F2" when the "Press F2 for Setup" option appears. Press the "Access IBM" key on IBM laptops or "F10" on HP desktops.

4. Navigate to the BIOS tab that contains the HDD password option, which will usually be the "Security" tab. Some computer manufactures instead include the password option in the "Advanced" tab.

5. Scroll down to the option labeled either "User Password" or "BIOS lock" and hit "Enter." Type the current master HDD user password when the prompt appears and press "Enter."

6. Input a new HDD user password and hit "Enter" again. Navigate to the BIOS tab labeled "Exit" or something similar.

7. Move over to the "Save and Exit" entry and press "Enter." Select "Yes" and tap "Enter."

This is from a factory repair and maintenance manual for Acer Aspire Laptops. It may work for you.

Forgotten Hard Disk Password
When the user keys in the wrong password three times, an error message appears. The user must now reset
the password.
1. Make a note of the error code that is displayed with the error message.
2. Run unlock6.exe from the DOS prompt in the following format:
unlock6 XXXXX 00
(XXXXX = HDD password error code, 00 = CRC base - default is 00)
3. Select Upper case ACSII Code from the screen that appears. The HDD master password is displayed.
Make a note of this password.
4. Reset your system. When the Enter Primary Master HDD User Password prompt appears, enter the
password you made a note of in step 3.
Resetting a BIOS Password
The user can reset a BIOS password using the clnpwd.exe utiility.
1. Copy clnpwd.exe to a DOS boot up disk (or flash drive).
2. Boot your system in DOS mode.
3. Execute clnpwd.exe from the boot up disk (or flash drive).
4. Press 1 or 2 to reset the required password as shown on screen.
5. A confirmation message appears when the process is successful.

immidiately you put on laptop constantly tap f1 or f10 to enter your bios setting, then try to disable administration password from there.

try this first

Hello,

Bad news, someone has set the hard drive security option. The hard drive is hardware locked and can't be unlocked without the password. Not even putting the hard drive in another machine will bypass the security. You can send the drive to hitachi repair in Dallas, Tx. for recovery but it is very pricey.

call the acer tech support or go on line a to www.acer.com and they should be able to get you need best regards mike

the only solution is for you to call the acer tech support and they can generate a password for you to gain access to your hard drive and bios.
visit: http://www.acerpanam.com/synapse/forms/webpage.cfm?siteid=7117&areaid=2&website=AcerPanAm.com