This is for the UK, I take it? PC World is not advertising McAfee products on its consumer-oriented website, but McAfee is still there on the PC World Business site pages - see http://www.pcwb.co.uk/catalogue/item/MCAF014 and http://www.pcwb.co.uk/catalogue/item/C0011335.
I've no idea why the single-user home version has disappeared, and it's probably not a good time right now to be trying to get an explanation out of them. Given the cut-throat world of retailing, I suspect that the words "profit margin" would be found in any honest explanation, if any such were forthcoming.
Hmmm. Strange. I just found that Staples are selling the McAfee products for 2011, but what is even more confusing is that they have the McAfee Anti-Virus Plus for 2011 (single user), which is the one that I usually buy, priced at £34.03 (excl VAT) and McAfee Internet Security 2011 - 3 User, priced at £21.26 (excl. VAT). The descriptions for both are more or less the same, so why two products priced so differently?
On-line McAfee are selling the Anti-Virus Plus for £44.99, which when compared to the VAT inclusive price of £39.99 for the Staples boxed copy is way over the top.
But what is most confusing is that on the McAfee site products page, comparing the Antivirus Plus with Internet Security, the Antivirus Plus is the more expensive, but the Internet Security product shows more features. It just doesn't make sense.