I think the number depends on what you have on your machine eg Net framework etc. There must be more than one for everybody though. I had problems installing two security updates for XP on one computer and three on another. I found by setting up a new account with admin rights they all installed on both machines.
Hi.Thanks for all the replies.As I am not the only one with just the 1 update I will class this as resolved.Many Thanks.1 last question though before I go.The malicious software removal tool.Do I actually need it.Would my A Squared not get rid of anything that MSRT would.