Thanks guys for the quick reply's. Well flops I have some software which measures the HD speed, but the main thing that shows is the PC takes a long time to load and run, change programs or sites on the internet. I have carried out antivirus checks with MSE and Mailwarebytes and also spyware scans with Superantispyware all with no results. The other thing this HD must be at least 8 years old but is still running silently and has been running 24/7 since I started crunching. Oh and there seems to be some problems with with bits of data on the software side as I get a warning that bits of script are missing. I am now attempting to save as much of my files as I can on to external drives Abarbarian but as the drive is running slow it is taking longer but thanks for the tip.
I think I will have to purchase a new HD as now I do not trust this one any more it has given me good service but I feel it jhas come to the end of it working life.