How to kill the Action center messages

During my bluetooth nightmare i have had 4 messages pop up telling me something isnt working right. these bloody messages are stuck on my screen and i cant get rid of them. Its the white box with the open action center link at the bottom.
Of course a re boot works but thats just stupid, i should be able to dismiss the pop ups. As it is windows cant fix it so its cath 22.
Anyone know what the process is i can kill? End task doesn't work.

Thanks.

Dave.

Thanks but im not trying to stop them, i wanted to get rid of the ones that were stuck on my screen.
I had two of them and the only way i could clear them was to re boot.

Thanks Shawn, ill have a read of that. Its only happened the once so far so hopefully it wont happen again but i think i will try turning some of them off.
These messages just seemed to be stuck on the screen. I couldn't even minimise them and they would always be at the front of other windows. Bloody annoying.

Damn, i hadn't thought of that. I do it occasionally in XP but didnt think of doing it in W7.

Cheers.