Msisadrv Service Defaults in Windows 8

ISA Driver by Microsoft Corporation.

Default Settings

Startup type: Boot
Display name:Msisadrv
Service name:msisadrv
Service type:kernel
Error control:critical
Group:Boot Bus Extender
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\msisadrv

Default Behavior

The Msisadrv service is a kernel device driver. In Windows 8 it is being loaded by Boot Loader before Kernel initialization. If Msisadrv 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 msisadrv service, Windows 8 will fail to start.

Restore Default Startup Configuration of Msisadrv

1. Run the Command Prompt as an administrator.

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

sc config msisadrv start= boot
sc start msisadrv

3. Close the command window and restart the computer.

The msisadrv service is using the msisadrv.sys file that is located in the C:\Windows\System32\drivers directory. If the file is removed or corrupted, read this article to restore its original version from Windows 8 installation media.