I'm guessing you're seeing this message during an attempting to run a(n ineptly written) hardware monitoring or diagnostics utility? Either way, if you describe in detail the exact situation, what you're hoping to accomplish, and the apparent obstacle, someone here may give you a more useful response.
An "SM bus controller" is hardware which you've already got, but perhaps you need to install some drivers for it. They would generally come from the motherboard manufacturer. Whoever made your computer's motherboard would almost certainly have a website with drivers available for download for that specific model.
A "coprocessor" has been integrated into every CPU since the 1990s. That term is anachronistic nowadays. It's a part of the processor which performs specialised computations on so-called floating point numbers. Your computer already has a coprocessor (uh, unless you're running a 486SX25 from 1991!), and it doesn't require drivers.