MJP808, Welcome to the windows 7 forums. I have had that problem with a machine and I searched and the Seagate and WD utilities did not fix the problem.
I went to grc.com and using the $$ program Spinrite, It solved my problem and I was able to get to the data on the drive. It is not cheap but if your data is important, then I recommend spinrite.
I don't have any financial interest, just a satisfied customer.