The trace was a bit too short (only 5s) so I can only tell you what I see from those 5 seconds.
Most of the Disk IO comes from the superfetch service which reads data from your slow 5400rpm TOSHIBA MK5059GSXP HDD and from the kernel which reads data from the pagefile because you only have 4GB of RAM.
The best way to solve it would be to replace the slow HDD with a SSD.