Thanks for your suggestions guys, HDDLife was very vague and no help unfortunately and the diagnostics tool was useless!
Drive is running at 45 degrees, not sure if that is good or bad. I am actually really worried about this because my brand new pc is grinding to a halt in windows for up to 3-4 seconds while something searches. I have a SSD for my primary drive but this 1tb drive has most of my data on.
Think I may have to run out and buy a new one at this rate.