Norton SystemWorks is a software suite that's designed to make your computer run faster. It automates tasks such as defragging, and it monitors your memory and CPU useage, making adjustments to make sure your computer is running as best it can.
Well, that's what it's SUPPOSED to do. So everyone who knows nothing about computers buys it.
What it really does, is it bogs the system down with all of it's monitoring and optimization software. Without exception, every computer I've ever worked on that had it installed ran BETTER without it. The usual response from the owner is "Wow, my computer is so much faster now!" and I haven't even removed any spyware or scanned for viruses yet..