I've removed and eliminated traces of the existing driver and installed the latest driver available from NVIDIA (258.96) which is also the official build and WHQL'ed.
I've been using the system for about 3 hours straight now since the driver update. Gaming is still as usual, but I'm not sure about light activities (such as browsing the web and music) will cause the crash or not. As previously mentioned, this issue never happens during intense fullscreen gaming or applications.
As for the outdated drivers, I haven't manage to find the latest for all of the peripherals, especially the Bluetooth module and the webcam drivers which is supplied only by the manufacturer, and it hasn't been updated (on their website) for quite a while already.