Wow that drive is tanking big time
I just ran HD Tach on my 320gig Sata 7,200 RPM drive which is very close to the same performance catagory as your drive
here are my results
Random Access: 12.8 ms
CPU Utilization: 3%
Average Read: 70.5 mb/s
its your cpu usuage that has my ears perked up the most >>>>
please download and run everest home edition >>>> then paste a system summary from Everest into this tread for evaluation
I am really interested in your CPU temps ?????
http://www.majorgeeks.com/download4181.html
will wait for your system summary
also if you open task manager / (ctrl/alt/delete) with no programs running on your desktop how much of your CPU is used up ?????