Disk Utilization in my PC always seems to be very high

The disk utilization in my PC always seems to be very high. I don't know what is causing it.

I thoroughly scanned my PC,

a) With a "Full System Scan" and found no issues.

b) I downloaded Norton Power Eraser and checked for presence of unwanted applications and found no issues.

c) I ran "System Scan" on my entire PC using NPE and found no issues.

d) I checked the presence of rootkits and misc. threats using NPE. And found no issues.

Still the disk utilization is very high in my PC. I am stuck here. I don't know how to proceed.

Kindly help me...

Apart from the above, a new processes viz. "NCS2Prov Module" is running every time I boot my PC.

 

Kindly refer the screenshot attached with this thread for clear understanding of my issue.

 

Please help...