It is best that you need to contact HP as sometimes it can be reset only by reinstalling the software which can also clear up your main drive memory.
Just a few days ago, I lost my windows vista admin passwords. I solved the trouble with the help of windows password reset tool. It not only support XP/Vista/2000/NT, but also compatible with windows 7, I tested it on my computer installed with Windows 7 and remove the local user and admin accounts password successfully. It's worth trying. You can download it from: http://www.reset-windows-password.com
Reinstall Windows or reset the old password with windows password reset tool. I do not recommend you to reinstall Windows, which may lead a data loss. So if you really can not remember the password, try following steps: 1. Download Window Password Seeker on another PC. 2. It is an ISO file. Burn the ISO file to a CD/DVD or a USB flash drive. 3. Boot the locked computer from CD/DVD and remove Windows password More info: http://www.passwordseeker.com/howtouse.html
For removing Windows Passwords in safety, I highly recommend windows password reset tools. Last week, and then I downloaded it and used it to remove the lost password successfully. You can download one from: http://www.reset-windows-password.com/how-to-reset-windows-password.html
Yesterday morning, I forgot my Windows logon password. Finally, my workmate Adam advise using Windows Password Seeker. The powerful software assist me get back into windows successfully. You can Search windows password seeker or visit their official site: http://www.passwordseeker.com
1. Use windows password reset disk If you forget your password, you can reset it using a password reset disk for your user account (or the password reset information stored on another type of removable media, such as a USB flash drive). If you don't have a password reset disk, you'll need to get someone with an administrator account on the computer to reset your password for you. 1. If you enter the wrong password when you attempt to log on, Windows displays a message that the password is incorrect. Click OK to close the message. 2. Click Reset password, and then insert your windows password reset disk (or other removable media). 3. Follow the steps in the Password Reset Wizard to create a new password. 4. Log on with the new password. If you forget your password again, you can use the same password reset disk. You don't need to make a new one. http://windows.microsoft.com/en-US/windows-vista/What-to-do-if-you-forget-your-Windows-password 2. Reset or recover password with Spower windows password reset tool 2.1 Download and install spower windows password reset tool. 2.2 Create an usb or cd password reset disk. 2.3 Boot computer from password reset disk. 2.4 Reset computer password with password reset disk. http://www.windowspasswordsreset.com/windows-password-reset-guide/
Firstly, use password prompt function on password locked computer
If you have set the prompt option when you set account password, it
may help you remember something about your forgotten computer password!
Secondly, reset computer password with default administrator account
Once we install Windows OS, there will be automatically generated an
"Administrator" account with blank password. Therefore, if we forgot
password on computer, we can have a try:
a. Boot system, and press Ctrl + Alt + Del keys twice when the Windows login screen comes up.
b. At the Classic Login window, input: Administrator and keep Password box null. Then press Enter key to login.
c. Recover computer password by: Control Panel - User Accounts.
Thirdly, find computer password with computer password reset disk
If we created this computer password reset disk before we forgot
password, we can opt for the disk to help us unlock password
efficiently.
a. Click OK and close the message box on the password incorrect prompt window.
b. Click "Reset Windows Password" and insert the password reset disk.
c. Do as the "Password Reset Wizard" to create a new password.
Fourthly, change computer password with Windows Installation Disc
Take computer Windows XP as example:
a. Start computer using Windows XP Setup CD.
b. When it asks to repair our current Windows installation, choose
"Accept" it and press "R" to run the repair. Then computer will begin
to repair our Windows and copy files to hard drive.
c. Setup will reboot system. Please don't press any key when there is "Press any key to continue..."
d. Now computer will do other tasks and there will be a progress bar
displayed. Please notice carefully the details shown at the bottom of
screen.
e. Once "Installing Devices" comes up, press keys: Shift+F10. Input:
nusrmgr.cpl and press Enter key at the Command Prompt window.
f. The same "User Accounts" window will display as it is in Control
Panel. Choose "Administrator account" and select any account listed to
change or remove your computer password.
Fifth, break computer password by DIY a password recovery disk
If the above four methods still can't help us reset lost computer
password, we can refer to this way now. DIY a password reset disk after
forgotten computer password means that we burn an .iso image file from
Windows password recovery software into a bootable CD/DVD/USB disk.
Now, take one of the top-rated Ainorsoft Windows Password Recovery
Corporation as example:
a. Download and install Ainorsoft Windows Password Recovery Corporation in any accessible computer (not from computer you want to unlock)
b. Burn an ISO image file to CD/DVD/USB Flash Drive
c. Set locked computer to boot from CD/DVD/USB Flash Drive and set the BIOS Setting for CD/DVD/USB Flash Drive.
d. Reset forgotten computer password to default Re123456.
The above ways on forgotten computer password reset are the collections of best bet for us to unlock lost computer password! So even if we forgot computer password, things will be OK soon!
source: http://www.windowspasswordrecovery.net/article/forgot-computer-password.html
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