No problem with the system ever before. The problem started today.
The computer is less than 2 months old (Sep 29, 2010)
No updates or new programs loaded that I am aware of.
Last Windows update was Oct 29, 2010
Norton was pre-installed on computer and running.
Running IE 8 version 8.0.7600.16385 32 bit
Windows 7 Home Premium 64 bit
Any ideas? I have very little computer experience. So please explain what I need to do- step by step.