Hey Bob. I'm Greg, an installation specialist, 9 year Windows MVP and Independent Advisor, here to help you.
Follow the illustrated steps here for the best possible Clean Install of Windows 7, which includes the media in Step 1: http://answers.microsoft.com/en-us/windows/wiki...
Remember that you'll need the Product Key off your retail packaging or COA sticker on PC which still needs to be readable to do this.
Make sure during the booted install to follow the illustrated steps to delete all partitions down to Unallocated Space to get it cleanest, then click Next to let it auto-create the needed partitions, format them and begin install - this makes it foolproof.
I hope this helps. Feel free to ask back any questions and let us know how it goes. I will keep working with you until it's resolved.
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