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. Run the Command Prompt as an administrator.

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 %WinDir%\system32\drivers folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 7 installation media.