You experience a delay during startup on a computer that is running Windows Vista or Windows Server 2008 when the computer has certain devices connected
Consider the following scenario. When certain devices are connected to a computer that is running Windows Vista or Windows Server 2008, each of these devices causes a 15-second delay during system startup. For example, if two such devices are connected, you experience a delay of 30 seconds during system startup. This delay typically occurs when human input devices (HIDs) or infrared devices are connected to the computer.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB967758.