Could be you'll have to wait and see, there may be some other thing to try & do, though.
When my issue occurred, (which really isn't resolved since I did not update anything) I
went as far as restarting in Safe mode, repaired Disk Permissions and Repaired Disk,
then restarted normally; and I did not get the pop-up notice of new software update...
No repeat notice in Console logs occurred, such as the one I'd posted in above reply
to Lex, though it had repeated each time I'd previously visited App Store, & got Error.
Then I went into App Store via System Preferences; it said there were updates available.
And I launched App Store from there to see if the busy wheel and Error notice would re-
appear as they had before. No odd events happened. It was later on when I checked to
see what if anything had changed (hours went by) and the App Store showed 1.0 version
updates of those two items. But I still haven't updated or upgraded...
Not sure what to say.
Except I have a few older working Macs that I still rely on. Only one can be upgraded to
a later OS X: my 1st Edition MacBook core-duo, can upgrade to Snow Leopard 10.6.8.
The current OS X in there is 10.5.8; same as my last model G4 Mini 1.5.
The newest Mac is this quad-core Late 2012 Mini i7, first run in January 2015 w/ 10.9.
Best of luck with all that matters! 🙂