My HP Windows Media PC started to run very very slowly last week for no apparent reason with no errors logged and no indication of the cause. After a lot of time I have narrowed it down to my Samsung SP1614C SATA hard drive. It takes a long time to boot (in safe mode or normal), but does so eventually (30 minutes or more) without any errors.
When Windows loads, I can do everything but disk access is extremely slow. I ran HD Tach to check the disk speeds and it shows sequential read speeds of less than 1MB/s for over half the disk. The last 50GB (of the total 160GB) had sequential normal read speeds according to HDTach.
I am a little suspicious as this failure coincided with a Windows Update (could be a red herring though). I have never seen anything like this, and am hoping that this kind of error is known to someone out there!?