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After undocking a laptop from the docking station, plugging in a parallel hardware key and running any function that calls said hardware key, a STOP error occurs. Windows STOP errors are commonly refered to as the Blue Screen of Death or BSoD.
"A problem has been detected and Windows has been shut down to prevent damage to your computer.
The problem seems to be caused by the following file: parport.sys
While starting a laptop that is docked, a specific hardware profile is established, and the Sentinel driver is configured for that profile. When the laptop is undocked, the machine should use a second hardware profile, but the driver continues to assume the first profile, so a call to that driver causes it to crash.
To avoid this error there are two options: