intel extreme tuning utility windows 10 asus

This computer was not pre-fab, it was actually built my friend who works in IT a few years back - he packed it with fans, as well, with the intent that I could one day overclock. This would almost makes me think that this CPU is NOT overclockable, except everywhere I read says that it is, which is why I purchased it. All of my drivers are up to date, if that makes a difference. Does anyone know what gives? It's not that ancient of a board. Intel XTU is a Windows-based performance-tuning software that enables novice and experienced enthusiasts to overclock, monitor, and stress a system. While there is an option for Advanced Tuning (all greyed out) and the other Benchmark Test there is no option, whatsoever, for Manual tuning. I downloaded the Intel Extreme Overclocking utility. It appears through Device Manager that I have an Intel(R) 6 Series/C 200 chipset - I also see a Z68 Express chipset listed.

I am using Windows 10 and have an AMD Radeon 6800 graphics card. I purchased the I5 2500k (3.3gHz 4 cpus) with the intent to overclock one day. My question still remains, am I overclockable with this chipset? Here is an updated (with new information) message post.

Intel extreme tuning utility windows 10 asus