IR Enumerator Service (IRENUM) Defaults in Windows XP

Infra-Red Bus Enumerator by Microsoft Corporation.

Default Settings

Startup type: Manual
Display name:IR Enumerator Service
Service name:IRENUM
Service type:kernel
Error control:normal
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\IRENUM

Default Behavior

IR Enumerator Service is a kernel device driver. In Windows XP it won't start until the current user starts it. If the IR Enumerator Service fails to start, the technical information about the error is added to the Event Log. Windows XP startup should proceed, but a message box should be displayed informing the user that the IRENUM service has failed to start.

Restore Default Startup Configuration of IR Enumerator Service

1. Run the Command Prompt.

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

sc config IRENUM start= demand

3. Close the command window and restart the computer.

The IRENUM service is using the irenum.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 XP installation media.