That JMicron driver, I'm sure you'll need. The one that I installed was needed, as USB response time was very slow. I don't know what other processes if affects.
This thing gets confusing to me. Like I know that I need the correct drivers, but don't know the exact function of all of them. I know that with a virgin system, provided there are no hardware issues, if there are problems, then it's the drivers. This is assuming that no AV/IS suite has yet to be installed, as it can appear to be the problem, when in fact it's not.
Fortunately, a driver disk shipped with my MSI notebook, any missing ones (there were a couple) can be installed from it. I open the Device Manager, if the component is listed, I point it to the CD to update it. Both my USB3 & USB2 drivers were not installed on that one. Neither was the proper sound scheme. It has a DYNAUDIO sound system, some generic HD Audio crap was installed. These are things that I've been working on, when I'm able.
To be honest, I don't know if I'm going to leave Windows 8 on that notebook. None of my OEM hotkeys works (FN+F1 through F12). These hotkeys controls a lot of functions, including my 5 dimensional power scheme, webcam/video, wi-fi on or off, CPU Turbo Boost (2.90GHz), a few other things. Unless MSI gives some major support, those functions are gone. It's powerful enough, Intel i5 M 480 @2.67GHz, 8GB DDR3 (10666) RAM, NVIDIA GeForce GT 425M (1GB DDR3 VRAM), to handle Windows 7 Pro x64 without breaking a sweat. Even when running XP Mode or other VM's, it doesn't strain at all. And I have support through January 2020.
My HP desktop is where I really need it. CPU/RAM resource usage is much less (esp CPU). There's really no loss of function, as there are no hotkeys assigned to a feature. Running Windows 7 & 8 is like night & day, a huge difference between the two in all around performance. My temps are lower, my fan isn't constantly screaming, so Windows 8 has done some good.
Still working with the Device Manager & Drivers, but for the most part, all seems to be OK. Yes, this keeps me busy too, and hopefully by summer, all will be worked out. But I've probably already made my mind up on the MSI. Windows 7 Pro x64 runs perfect on it, I don't need a "lite" OS on it, and I like for the default functions to work properly, especially the power schemes & Turbo Boost.
Saltgrass, hope all works out for you. Check back with me & let me know how everything works out.
Best of Luck,