None of my printers work as of today. get the following message:

The optical photoconductor needs to be replaced.
The printer is out of toner.
The paper tray is almost empty.
Paused

Right, so some apps work (looks like mostly Apple apps) and some apps don't work (looks like mostly non-Apple apps). First thing to check: plists, also known as permission files. Create a new standard account and see if the apps work there. If they don't, create a new admin account and see if they work. If they still don't, then delete the new accounts, create one more new admin account, download (using a working app) a copy of a non-working app (Chrome, for example) and try again, as maybe the app itself was corrupt. If that works, good. If that doesn't work, then odds are it's not corrupt apps or plists.
Next up: directory problems and permissions. Creating the new accounts should have bypassed the permissions problems, but just in case you should run Disk Utility and fix permissions. And you should boot from the system disc and run Disk Utility and repair disk, which will get rid of most directory problems. If you have Disk Warrior, Drive Genius, or Tech Tool Pro, use them, too, as they will sometimes fix directory problems that get past Disk Utility.
Or, you could do a simple, quick, easy fix: reformat your drive and restore from your backup (you do have a complete backup, don't you? If not, why not?) Restoring from the backup will put you back to where you were before you updated. I would then check for corruption, bad plists, permission problems, and directory damage... and run the updater again once any problems are fixed.
What you are describing is not normal.
Message was edited by: Charles Dyer

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