Acer aspire 5536 forgotten the HDD user password

Sounds like the hibernation and hard drive setting need looking at under the power controls, also check that a password is not required in returning from hibernation.

Acer Master Password Password to unlock System Disabled Yahoo Answers

Get Acer Aspire BIOS password recovery with article help: http://www.windowspasswordsrecovery.com/articles/computer/how-to-reset-bios-password.html

so please enter the password.if you forget the password then go to service center there is no other solution.because your hard disk not boot until you enter password .it means no software can run to crack the password.

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

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.

If you forgot the windows login password and want to recover or reset windows password, there is two methods to reset windows login password:

Methods 1: Use the password reset disk to recover the Windows password, by this methods, you need create a Windows password reset disk before you have lost or forgotten your Windows admin password.

Method 2: Using Windows Password Recovery software to recover Windows password
As an easy method to recover the forgotten Windows password, there are only four steps as follow:
Step1: Download Anmosoft Windows Password Reset V8.0( http://www.resetwindowspassword.com
)and install it.
Step2: Burn the ISO image file onto a blank CD/DVD or USB.
Step3: Boot up your Windows PC by the bootable burned CD/DVD or USB in minutes.
Step4: Remove the forgotten Windows password on the operation interface and logon PC without password.

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

my laptop is asking for a primary master harddisk password what do i do if i dont know the password?