Isapnp Service Defaults in Windows 8

PNP ISA Bus Driver by Microsoft Corporation.

Default Settings

Startup type:Manual
Display name:Isapnp
Service name:isapnp
Service type:kernel
Error control:critical
Group:Boot Bus Extender
Path:%SystemRoot%\System32\drivers\isapnp.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\isapnp

Default Behavior

The Isapnp service is a kernel device driver. In Windows 8 it will not be started until the user starts it. If Isapnp fails to load or initialize, the error details should be automatically logged. Then Windows 8 is restarting the PC and attempting to use the Last Known Good configuration. If the Last Known Good configuration isn't working properly, Windows 8 startup ends with a Stop error. If you disable the isapnp service, Windows 8 will fail to start.

Restore Default Startup Configuration for Isapnp

1. Run the Command Prompt as an administrator.

2. Copy the command below, paste it into the command window and press ENTER:

sc config isapnp start= demand

3. Close the command window and restart the computer.

The isapnp service is using the isapnp.sys file that is located in the %WinDir%\System32\drivers folder. If the file is corrupted or deleted, you can put it back in there.