SP2 JAM-UP- MS does it again

We are unable to be certain but our previously perfectly running computer has slowed to a crawl.
It appears to have auto installed SP-2 and since it is our main comp in Office is most annoying.

Our techs tell us that this is a common phenomenon with SP-2, but I cant believe it.

It appears that an A something program is always running in the background and chewing up processor speed.

Can I just rip out SP-2 and is this an SP-2 problem?

I just read an article slamming you guys about your criticism of Microsoft, but there are a lot of users upset over here.

Gus