I would keep the Norton Internet Security and uninstall Microsoft Security Essentials. I'm not saying Microsoft Security Essentials is bad (I'm using it right now), it's just that I think Norton is a little better.
"The SYSTEM_SERVICE_EXCEPTION bug check has a value of 0x0000003B. This indicates that an exception happened while executing a routine that transitions from non-privileged code to privileged code. "
Are you running both at the same time? If so, turn one of them off and only use it as a manual scanner. Better yet, uninstall one of them completely. Running 2 Antivirus programs simultaneously is probably one of the dumbest things one can do. It's a classic case of "1 is good, so 2 must be better, right?". I wouldn't blame you if this is the case though, as I made this mistake years ago, and know many people personally that did the same.
It could be many different possible issues. Too many to try and count. The best option for both machines. Get rid of one of the antivirus software programs. You will also notice a performance boost in the machine, as antivirus programs drain system resources heavily.
Never run more than a single antivirus as above poster said!
Also I totally disagree with the idea of keeping Norton. Norton Antivirus is one of the worst antivirus packages you can get. Keep MS Security Essentials
How do you know this? If you could be so kind as to point me in the right direction to a website or online literature to help me choose between the two. Is this based on your own experience? Or do you bandwagon? I have previously had great experience with both types of software. Thank you.