@Alf
My eldest son isn't exactly tech savvy, and yet I gave him an Ubuntu machine the other day and he had worked out how to use Firefox and Open Office within 10 minutes.
I do wonder though if the Carphone Whorehouse's Balk-balk IT staff would even support it.
I can imagine the conversation.....
"Hello. My Broadband doesn't work"
"OK, have you got anti-virus installed?"
"Er, No. It's running Linux. I didn't feel the need for anti-virus"
"Er, OK. You've got a virus. That's why your broadband doesn't work"
"Oh, OK. Any other ideas?"
"Well, yes, have you got the latest service pack for Windows?"
Ad Infinitum