Need a Clean Install of Windows 7 Home Premium

[Mr_Western]

Hey Guys,
Ok, so I am in need of a clean install of my OS, no need for any data presently on my laptop. So here is my question, where can I get a Genuine Windows 7 Home Premium 64-bit Operating System disc to use on my system that is free and can also work with my License key [which by the way is the original key that came with the laptop].
Now I know that dell [which is the manufacturer of my laptop, I think it is called an OEM key] has downloadable .ISO of the OS I am in need of but I need to know if I can use that on my system with my license key and work:

Here is the .ISO image. Main article the iso came from-->
[http://en.community.dell.com/support-forums/software-os/w/microsoft_os/3316.2-1-microsoft-windows-7-official-iso-download-links-digital-river.aspx]

The .iso image I need-->
[http://msft.digitalrivercontent.net/win/X17-58997.iso]

So guys is that the .iso file I need or is it something else, if so where to get it and how to use with my License key.

Laptop Specs----->Dell XPS 15 L502X
8 GB DDR3 RAM
750 GB HDD (85% Free)
Windows Home Premium 64-bit (stock OS)
Intel Core i7-2670QM CPU @ 2.20GHz
Graphics Card GT-540M (2 GB)

Thanks Guys for any suggestions
Yours Truly
Mr Western

 

[Mr_Western]

I would use Killdisk as said above. Then you can create a new partition in that space and finally merge it with existing one.

Ok thanks, will do. I think it is about time I close this thread, Thank you all for your help and I will appoint best answer to House70 for his immediate and helpful suggestions.

 

[Mr_Western]

Best answer selected by Mr_Western.