My Toshiba Satellite A75 S226 has developed a sound problem, that Microsoft support says is a hardware problem. It's 1990's technology. Are there any after-market sound systems that would work through USB-2 ports? And also, I have a Cooler Master ATC-110 case that I've never used in ATX. Is it feasible to build a new computer in ATX, or is the technology too old?