Hi, I don't have Vista, but it does sound dodgy to me. You are quite right not to click on any link. Instead, run your anti-everything, especially Malware, programs. Always best to be on the safe side.
I usually find that having started the responses to your query, others will soon come on with their suggestions too.
Thanks guys. I did not click on the link, just closed it down. I have already done all the various scans which didn't throw up anything. Yes I am running a geniune copy it was already installed on the dell when I bought it from new.
Just been on the microsoft website and it asked for validation, and it passed ok.
The only thing I can immagine is that microsoft is just double checking that people have genuine windows. I'll tick this as resolved, but if it happens again I'll post more information. Thanks again.