i have had my laptop for a few months now running windows eight here are my specs
intel i7 1.90 GHz @ 2.40GHz
8.0 GB RAM
64 bit operating system

my disk is running at 100% constantly and running like a wet week im not sure what has made this happen im not much of a tech head so can someone please help me out and dumb it down immensely ?

so far ive tried virus scans, disk clean up and de frag but i have no idea what to do now.

Thanks in advance Kiddo