The 0×0000007B error usually appears during the start up of Windows, or when trying to install a fresh copy of the Operating System. The error is typically displayed in the way seen below.

STOP: 0×0000007B (parameter1, parameter2, parameter3, parameter4)
INACCESSIBLE_BOOT_DEVICE

It all sounds pretty daunting, but the inaccessible boot device hint tells us much about how to fix the problem itself.

The issue stems from one of three causes.

You could be suffering from a virus on the boot sector. These are particularly devastating viruses because they render an operating system useless and can prohibit any kind of access to the OC controls. In situations such as that where the damage is severe, you will need to repartition your hard drive and proceed with a complete re-install of Windows.

It may be possible to get rid of the virus if you have access to an anti-Virus control suite, and the system is functional enough to allow you to use it. Run a complete scan and remove the viruses individually, combining protection utilities where appropriate to ensure that all of the bad files are dealt with.

Alternatively, the fault could potentially lie with the boot controller. Every time your operating system is loaded, the boot controller loads up device drivers which run through the process of initiating the rest of the software. If the device drivers become corrupt or are removed altogether, you will receive a 0×0000007B error, probably amongst others too.

A registry cleaning utility will go a long way to ensuring that your device drivers are kept in tact. Remember that all the information to these drivers is stored in that one registry. If a virus or manual change alters the registry in a bad way, you can be faced with no end of problems. For that reason, it’s a good idea to keep a backup of a working registry at all times. If you’re faced with the device errors, you can reset the registry and regain control of the system.

The error is occasionally born from a collision with the IRQs and port allocations. This is more of a hardware issue, or at least, an issue with the way that your devices have been configured. To fix the problem, you’ll need to enter the device manager and ensure that different devices aren’t stealing the same IRQ line. If you have collisions, Windows will be thrown off and the errors will appear.

0×0000007B errors are often quite intimidating to receive. The blue screen of death isn’t a pleasant sight for any Windows user, but the persistent nature of the error can make it hard to fix. If you’re suffering from a boot sector virus, probably the least wanted reason for this error, you’ll need to reformat before you can begin to use Windows properly again.

So naturally, it’s a wise idea to stay up to date with the best anti-Virus protection. Make sure that you’re protected from the latest and obscurest threats. Also, keep a registry cleaning utility handy and put it to use once a month to clear up any of those potentially debilitating device driver errors.

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