The updates come through the automatic OSX software update app.
I deleted iTunes from the computer and followed the support guidelines I found. But that didn't work and now I have no itunes because it won't let me re-install
The other two are the ones that you have linked to
Thank you for trying to help
Well, if a certain version of an app was installed & then deleted then SWUPD won't see it's not updated & won't list it.
If all the above fails, then it appears to be time for a relatively painless Archive & Install, which gives you a new/old OS, but can preserve all your files, pics, music, settings, etc., as long as you have plenty of free disk space and no Disk corruption, and is relatively quick & painless...
Just be sure to select Preserve Users & Settings.
This advice was right on- Thank You!
I ran a repair disk permissions on the Hard Drive and it came out showing a few system files that could not be repaired. Then I started to understand that this software update problem was related to this system corruption (?)
So I put in the install disk, and ran the Archive and Install option like you suggested. That took it back to OS 10.5.4, but I then was able to run all the installers that software update wanted- Everything is back to normal, every update has succeeded.
Now I am buying more ram and I am going to work on getting Lion onto this computer.