BSOD while copying large files or downloading (especialy via wow client)

Hey guys, I purchased a new PC just two days ago, and I have been having trouble with the computer suddenly losing network access. I restart the computer and it works fine again for a small amount of time and then the same thing occurs. Now it is also often resulting in bsods.

I was wondering if any of you lovely people may be able to offer some insight?

The networking is a Atheros 8151


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