First of, there's nothing wrong with a fake Arduino -- we all know that Arduino is open source and everyone can create their own copy with the blueprint from Arduino website.
Okay, now onto your problem.
I too bought a fake Arduino because I'm cheap.
I was able to find the USB Driver from another website (Hobbyists.co.nz) but it took thorough searching on the internet. So, I hope this blog post will help boost that article up in the search results.
In any case that the website will be gone, hopefully not, I'm copying the link to the USB Driver here -- which is hosted by Arduined.eu. Simply install then off you go.
Happy hacking!~creek23
