Consider the following scenario:

• You have a computer that is running Windows Vista Service Pack 1 or Windows Server 2008.
• The computer has an integrated graphics adapter and a discrete graphics adapter.
• When you start the computer, you are using the discrete graphics adapter for the display output.
• You switch the display output from the discrete graphics adapter to the integrated graphics adapter.
• A power event occurs. For example, when your AC power cord is disconnected, the power supply system fails over to a DC power source.

In this scenario, you may receive the following Stop error:

Stop: 0×00000018 (parameter1, parameter2, parameter3, parameter4)
REFERENCE_BY_POINTER

Note: This problem occurs only on computers that have certain hardware installed.