Applications can register to receive Plug and Play device interface notification when an interface of the type specified is enabled or disabled.
If you receive:
Event Source: PlugPlayManager
Event ID: 256
Description: Timed out sending notification of device interface change to window of ""
in the System Event Log:
1. You have an application that has registered to receive Plug and Play device interface notifications for a specified type.
2. The specified interface has been enabled or disabled.
3. The application has not responded (acknowledged) the event within 30 seconds.
NOTE: This is a warning event only.