KB2633880 - KB2518864 - KB2572073 installed but not "seen" by Windows Update
Today (Tuesday May 22 2012), after seeing the yellow icon in the Task bar, I ran Windows Update and installed successfully KB2633880 - KB2518864 - KB2572073, I turned off the PC by clicking on the red Turn Off icon with a 4 color shield icon, waited for all 3 updates to install and for the PC to shut down by itself. It took a while but everything went fine. No error message.
After powering on the PC, I went back to Windows Update and was surprised to see Windows Update suggesting to install .... KB2633880 - KB2518864 - KB2572073 i.e. the same three components that I just successfully installed.
I ran Microsoft Fix It that found 1 issue (Windows Update Components must be repaired (next line) Repair Windows Update Components. I clicked on Next. Everything went fine. I got a green check "Fixed". I turned off the PC (without installing the 3 updates which I already installed).
I powered on the PC and went back to Windows Update which is asking me to install KB2633880 - KB2518864 - KB2572073. It is as if Windows Update does not "see" that these 3 components have already been installed.
Note: I am having the same problem on another PC. Both PCs runs XP SP3 and are standalone PCs. One is a desktop. The other a laptop.