Why doesn't SMS check to see whether I've actually installed security updates before inflicting them upon me?

The SMS client is present on my computer (Windows XP SP2) to ensure that it's up to date with security updates. I think that's a good thing.

I happen to also use Windows Update and therefore tend to have security updates on my machine before I arrive in the office. Due to traffic in the UK I often work from home first thing in the morning and thereby reduce my commute.

Unfortunately SMS kicks in when I connect to the corporate network (as it did this morning) and informs me that I must allow it to update my system some time today.

Why on Earth can't it check my system before forcing me to go through the hassle of slow network performance/CPU and the inevitable reboot. I'm not an SMS expert and therefore don't know whether SMS can be configured to check first or if that's a limitation of the product. Please hit the "comment button" if you have an incling either way.

YES I GET FRUSTRATED BY SECURITY sometimes just like everyone else. Effective Security is all about using controls in a meaningful way. I hope I've "lost the plot" somewhere here and one of you is going to add a comment letting me know how to comply with policy whilst avoiding the interruption of unnecessary updates.