I have upgraded my entire pc but took my old hard drive and put it in my new pc. I have noticed that both the cpu and ram aren't overloaded at all but my system runs very slow. Disk usage is almost always at 100% and no specific programs are using a lot of read/write. HD Tune Pro gives me an access time of 186 ms and transfer rates between 0.1 MB/s and 1.8 MB/s with an average of 0.6 MB/s. The drive isnt partitioned or fragmented in any way and out of the 1TB only 450 GB is used. Is the hard drive dying?