I don't have an answer to this problem but I think your timestamp is a red herring. Mine is 04/08/2004 00:56. It depends on whether you have the cd or download (which version and where it came from) or WU. Mine is the UK cd version.
For your problem, have you tried checking your screen refresh rate? Have you updated your graphics card drivers?
Norton by itself isn't enough, I'd recommend Ad-Aware 6, Spybot and Windows Defender as a three pronged attack on spyware.