I am putting Windows 7 svc pack 1 back on and then will upgrade from there. But it is saying that there is something wrong with the partition of the hard drive. I had a repair place put the hard drive in, I did not do it. Now I cannot get my operating system to down load to the hard drive. Very upset with this place. How do I go back and wipe out the hard drive so that I can repartition it as if it is just going in for the first time, so that I can get my os loaded.