Pitcher, thanks for the link, but I've already been to it as a part of my previous troubleshooting. A check for updated drivers has already been done, and I'm going to make the rash assumption that my two-week-old hard drive probably doesn't have any bad sectors yet. Am running KIS, all my software is legal, I don't engage in P2P file sharing, and I've been a professional help desk technician for 11 years, so the chance of malware infection is approaching zero.
Issue appears to primarily occur when the computer is warm and when multiple tasks are being performed. Thus, I'm going to assume that this is a problem with the processor or with overheating. I will repeat my question: Where can I find a service manual (not the user guide) for the G53Jw, or at least directions on how to get to the cooler/heatsink so I can take out the heatsink and repaste it, and blow out the fan vent with Dust-Off? If you cannot publicly distribute the service manual, message me privately and I can give you an email address to send it to.