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The Parallel port driver service failed to start

I did a P2V (Physical to Virtual) migration of an SBS 2003 server. It was running on physical hardware but now it is running in Hyper-V. I removed the device drivers for things that were no longer connected to the SBS; this is standard practice in P2V migrations.

I started getting error 7000 logged in the event viewer, complaining that the Parallel port driver service failed to start.

Event Type:    Error
Event Source:    Service Control Manager
Event Category:    None
Event ID:    7000
Description:
The Parallel port driver service failed to start due to the following error:
The service cannot be started, either because it is disabled or because it
has no enabled devices associated with it.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

How to fix it

The parallel port has already been removed from the device manager, and there are no related services that I can see.The only fix is to open up Registry Editor (regedit) and change the start value from 3 to 4, as shown below:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Parport]
"Start"=dword:00000004

As always, be careful in the registry!