Posts Tagged ‘reset Hyper-V password’

How to Reset VHDX Password for Hyper-V Windows VM

September 19th, 2014 by Admin

VHDX is a Hyper-V virtual hard disk format introduced in Windows Server 2012. If you’ve forgotten Windows user password for a Hyper-V virtual machine (VM), PCUnlocker can be of help! Just mount the .vhdx image and it allows you to reset lost Hyper-V password immediately!

How to Reset VHDX Password for Hyper-V Windows VM?

  1. PCUnlocker comes as a CD image that needs to run from a CD or USB drive. To get started, you need to burn the PCUnlocker ISO image to a blank CD or USB drive. This can be done with the free burning program ISO2Disc.

  2. After you’ve created a boot CD/USB drive, insert it to your computer that your VHDX file is stored on. Change the boot priority order in BIOS and get the computer to boot from your created media.
  3. Once booted to the PCUnlocker program, click on the Options button at the left bottom of the screen, and then select Mount Virtual Drive. In the file open dialog box, choose your VHDX image and click Open.

  4. The program will mount the selected VHDX file as virtual drive. Click the Browse button to locate the Windows SAM registry file on your virtual drive, it will display a list of existing Windows accounts in your Hyper-V VM.

  5. Select a user account that you want to reset, and click on Reset Password button. The program will reset your Windows VHDX password and unlock the account if it’s already locked out or disabled.
  6. Click Restart and disconnect the CD/USB drive. Afterwards you can turn on your Hyper-V virtual machine and login without entering a password!

Note: After password resetting for a VHDX image, you might experience a power-on issue and this can be resolved easily with this trick: Fix: The chain of virtual hard disks is inaccessible.

Forgot Windows Password for Windows Server VM in Microsoft Hyper-V

July 8th, 2013 by Admin

I installed Windows Server 2008 R2 with Hyper-V. I left the machine standing for a couple of days. After a week I got back to the machine I couldn’t remember the password. Is there a way to recover or reset the administrator password on a Hyper-V virtualized 2008 AD server?

Forgot Windows password for Hyper-V virtualized server? How to reset local / domain administrator password on a virtual machine running in Microsoft Hyper-V? There is a simple way to reset your lost Hyper-V server password without data loss. Just boot your Hyper-V virtual machine from PCUnlocker ISO image which contains a password reset utility, and it enables you to reset both local administrator password and domain administrator password easily!

How to Reset Windows Password for Hyper-V Server?

  1. Download the zipped ISO image of PCUnlocker and save it on your host operating system. Unzipped the download file and you’ll find a bootable ISO image file: pcunlocker.iso.
  2. Open your virtual machine from Hyper-V Manager. Click on the File menu and select Settings….


  3. In the Settings of the VM, select the DVD Drive under IDE Controller 1 tab. In the right panel, specify the DVD drive to use the ISO image file (pcunlocker.iso) you just downloaded.

  4. Go to the BIOS tab in the left panel, move CD to the top of all available boot devices.

  5. Click Apply to save your changes.
  6. Power on your virtual machine. This time it will boot from the PCUnlocker ISO image.
  7. After a while, you’ll see the PCUnlocker program which displays a list of local user accounts existing on your Hyper-V server. If you need to reset domain admin/user password, you need to click on the Reset Active Directory Password option. It will then display Active Directory user accounts.

  8. Choose a user account and click on Reset Password button. The program will unlock/reset your Windows password in no time.

Now you’ve successfully reset your lost Windows password for Hyper-V server. Unmount the PCUnlocker ISO image from the virtual machine’s DVD drive and restart the virtual machine. You can then log back into your Hyper-V server without a password! This method works with all versions of Windows virtual machine running in Microsoft Hyper-V, including Windows 8/7/Vista/XP and Windows Server 2012/2008/2003/2000.