Fix: BSOD Error 0x0000007B on Boot on Windows 7 and Server 2008 R2 | Windows OS Hub

I was getting a STOP: 0x0000007B code (it was hard to see this as when VM’d, bluescreens only show for a fraction of a second.

This stop code corresponds to the INACCESSABLE_BOOT_DEVICE error and is related to the difference of the hard disk controller of a new server (a computer or a virtual machine) from the original equipment. When booting, the driver necessary to boot from the new controller is not loaded. Windows cannot be started due to it.

In the debug mode you can see that Windows boot stops at the stage of loading the CLASSPNP.SYS driver.

To fix the error 0x0000007B, you need to boot from any Windows installation media (with Windows 7 / 2008 R2 or higher) or a boot disk (for example, DART). Or using the recovery console (this can be added to the image if you use StarWind Converter

In the Registry Editor window, go to the registry hive HKEY_LOCAL_MACHINE and select File -> Load Hive. On the local server drive (don’t confuse it with the WinPE disk), select the file \Windows\System32\config\SYSTEM. This file stores the system part of the registry your local Windows copy.

In the loaded hive, go to registry key HKEY_LOCAL_MACHINE\local_hkey\ControlSet001\services\.

Find these registry keys:

• Atapi;
• Intelide;
• LSI_SAS.

Find REG_DWORD parameters with the name Start in each of these keys and change their values to 0 (0x00000000).

If you had switched your SATA controller mode to AHCI before this error appeared, you should also set Start = 0 in the msahci section.

To save the changes in the local registry file on the disk, go to the registry key HKEY_LOCAL_MACHINE\local_hkey and select Unload Hive in the menu.