Okay, I've installed the remaining optional windows updates, one was some definitions for Microsoft security essentials; the other, I think was something to do with WLAN, didn't strike me as anything major. I've updated them, and done a search for more, but its telling me I'm up to date.
I've also downloaded those stress test/monitoring programs you posted, although I haven't used them yet, just making sure I have them handy for a later date.
I think you're right about the USB drivers
on the ASUS website, I can remember, that I thought they where both the same driver
, and I just downloaded & installed the one with the later date, which is the host controller. (It was dated 2011, the other, 2010).
However, I've had some trouble installing the other driver. The 'non controller' driver, refuses to try and install, it claims that "a later version of Renesas Electronics USB 3.0 Host Controller Driver is already installed on this machine".
I'm a little stumped here, I uninstalled the host controller driver via device manager> right click> uninstall drivers,(I'm not sure if that's the correct way to do it, but I'm no expert on drivers), I restarted, tried the 'non-controller' driver again, but it gave the same response as before.
So, I reinstalled the other USB driver, the '2011, host-controller ( V188.8.131.52)', but, I'm not sure if it installed correctly, it sort of gave an error, and wanted me to browse and show it where the driver was, I wasn't really sure what to do here, I directed it to the setup.exe file I used to run the driver installer, and that seemed to satisfy it. It supposedly installed the driver, and the program didn't indicate any errors.
Yet, in device manager, the two warning symbols were present again for the USB Host controllers (these did disappear however, when I uninstalled the host-controller as I mentioned further up). Then after a little while, I noticed a little 'bubble' pop up from the task bar, informing me the driver didn't install correctly. If I run the install again after this, (for the host controller driver), it doesn't ask me to identify a location again, and when its done, it informs me that the program has finished maintenance operations.
So now I'm not quite sure what to do next, I'm thinking I'm at fault, perhaps when I mentioned that the driver installer program wanted me to show it where the driver file was, I was making a mess of a really simply task, (but I'd assume it knew where its own driver was). I hope the above is clear enough; reading back over it it seems like a jumble.
Thank you again for your help & patience,