Regarding the "No drivers installed" message, I presented the case to a friend of mine who happens to be an engineer.
He explained to me that this is normal because the chipset... happens to be... a chip-set... formed by various components (Northbridge, southbridge) thus Windows* will initially present the SMBus with an exclamation mark and after loading the package that the manufacturer provides it will be enough for the operating system to handle the chipset components.
He told me that the part of the message says: "No drivers are installed or are required", so... I should consider the possibility that Windows* does not required additional drivers at that moment since I already loaded the INF.
Again, since my system is working fine I will leave everything like it is until I start overclocking my processor !!!