Ql40xx Service Defaults in Windows 7

QLogic iSCSI Storport Miniport Driver by QLogic Corporation.

Default Settings

Startup type: Manual
Display name:Ql40xx
Service name:ql40xx
Service type:kernel
Error control:normal
Group:SCSI Miniport
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ql40xx

Default Behavior

Ql40xx is a kernel device driver. In Windows 7 it won't be started if the user doesn't start it. If Ql40xx fails to start, Windows 7 attempts to write the failure details into Event Log. Then Windows 7 startup should proceed and the user should be notified that the ql40xx service is not running because of the error.

Restore Default Startup Configuration of Ql40xx

1. Run the Command Prompt as an administrator.

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

sc config ql40xx start= demand

3. Close the command window and restart the computer.

The ql40xx service is using the ql40xx.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 7 installation media.