To be sure of the applicability of the update for your product, please go to Help > Updates and it would show all the available & applicable updates. Install the patches from there.
Incase you still run into issues, please share the following logs:
<user home>\AppData\Local\Adobe\AAMUpdater\1.0\aamu.log, aamui.log, aamun.log
Thanks for the help!
I'm running PSE 10 on Mac and I can't find the above directory. Is there a different one for Mac users?
In addition, I don't see a Help > Updates in my menu. Is it possible that the Mac version has a different setting?
Moving this discussion to the Photoshop Elements forum.
Are you trying to install a downloaded patch version? What happens if you just go to Help>Updates in the editor?