When I shutdown my computer (Windows XP Media) I get a message for about 30 seconds before shutdown. The message is: The Instruction at ox69532997, Reference memory at "ox0000000"could not be read. I have 3 computers and this message occurs on all three. I have a feeling this is being caused by Symantec's Norton Internet Security 2007 or HP printer drivers. This does not cause any problems but is annoying.