Yes.
I'd replace it with an SSD which is the best upgrade you can give your PC - lightning fast, better than a new higher end PC without one - swap it in and do the Clean Install in the link below:
Do this Clean Install which should get you past all difficulties as it has hundreds of thousands of others who have followed the steps in this link and never come back to report another problem: http://answers.microsoft.com/en-us/windows/wiki...
You will get and keep the best possible install to the exact extent you stick with the steps, tools and methods in the linked tutorial. It's a better install than any amount of money could buy and a great learning experience that will make you the master of your PC.