IR Bus Enumerator (IRENUM) Service Defaults in Windows 7

IR Bus Enumerator.

Default Settings

Startup type:Manual
Display name:IR Bus Enumerator
Service name:IRENUM
Service type:kernel
Error control:ignore
Path:%SystemRoot%\system32\drivers\irenum.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\IRENUM

Default Behavior

IR Bus Enumerator is a kernel device driver. In Windows 7 it won't be started if the user doesn't start it. If IR Bus Enumerator fails to load or initialize, Windows 7 startup continues without error messages. The failure details are being written into Event Log.

Restore Default Startup Configuration for IR Bus Enumerator

1. Select your Windows 7 edition and service pack, and then click Download.

2. Save the Win7_IRENUM_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The IRENUM service is using the irenum.sys file that is located in the %WinDir%\system32\drivers folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 7 installation media.