Thankyou for your reply, I did in fact run the Data Lifeguard Diagnostics (sorry that slipped my mind, but I did do it) and it said the device is 100%.
The same page which suggested the Data Life Guard Diagnostic (part of the Microsoft Drivers Troubleshooter page) also suggests altering the register keys. I didnt do this, nor did I create a subkey. However, I checked the drives right down to the registry keys and they are all present. I dont see anything damaged, but I am not an expert. Thankyou for your help~ I notice that this problem (on the tech websites) is often associated with Windows 8. I have to wonder if the updates I got must have been similar to the Windows 8 impasse? Again, just guessing.
This week I am going to telephone support and see if they can suggest any tricks. If you can think of anything please spill the beans 
BestWishes
