It's an actual computer store - just a little shop but they have a repair warehouse too. Where I am (in Scotland), we really only have him or PC World and I refuse to go there unless absolutely stuck!!
That adapter was the only one he showed me and they make you feel so inadequate about what you're asking for that you end up just taking what they're advising you to take.
I'm gonna take both the adapter and the writer back to him and get a refund and order one of the writers that are recommended on here.
Now for the Wireless adapter - what would you recommend? I'll go and look at that site you were talking about.
I don't even know if I needed the wireless adapter to be honest - although it's a wireless router, I have it wired to my desktop and use it wirelessly for my laptop. I just thought since i was opening up the desktop to put in a writer, I'd be as well putting in the wireless card as well.