This article was previously published under Q262129
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The following Event ID may appear in the system event log:
Event Source: PlugPlayManager Event ID: 256 Description: Timed out sending notification of device interface change to window of "program or service name and/or GUID."
This Event ID indicates that an application that registered to receive Plug and Play device interface notification did not respond within 30 seconds of receiving a notification event. Applications can register to receive Plug and Play device interface notifications. After they are registered, applications receive notification events when an interface of the type they were interested in has been enabled/disabled for use by applications. This timeout is logged in the system event log. This Event ID is merely a warning that the application did not respond, and it can be ignored.