FAX setup/Printer setup may need to be redone after upgrade

Question

I just discovered that my FAX settings were disabled after upgrading (noticed when I hadn't received any junk faxes for 3 days). In the Preferences panel I discovered that my FAX settings were no longer there. When I went to re-enter them I found that Leopard "knew" what they should be, but hadn't re-enabled the FAX driver.
Similarly, I had to re-select drivers for my printers.
I hope this sames someone some time.

Answer 1

One possible cause for this error message is that files in Firefox's program folder have become locked. In that case, Firefox may suggest that you restart Windows since that usually will clear file locks. If the locks keep returning, it could be that they are enforced by your security software.
One workaround is a "clean reinstall", meaning you rename the Firefox program folder and run the full installer again, ''without uninstalling''. This should leave your settings undisturbed. However, if you are a cautious person, you might make a backup of your settings folder, or at least your bookmarks.
(1) Back up settings or bookmarks (optional)
On Windows 7 (or Vista or 8/8.1), you can paste this into the Start menu search box, or into the address bar of a Windows Explorer window:
%APPDATA%\Mozilla\Firefox\Profiles
That should open a folder that contains one or more folders that have a semi-randomized name. If there are multiple folders, back up the most recently updated one. If you are in a hurry or have limited space on your backup media, drill down into the folder and back up the subfolder named bookmarkbackups.
(2) Download the full installer for Firefox from
https://www.mozilla.org/firefox/all/
Scroll down to find your preferred language and operating system.
(3) Rename the Firefox program folder
On Windows 7 (64-bit), that would be this folder:
C:\Program Files (x86)\Mozilla Firefox
Rename it to something like
C:\Program Files (x86)\OldFirefox
(4) Now run the installer. It should automatically detect your settings folder and have you back up and running.
After this "clean reinstall" process, you may discover that you are missing a plugin or two. Some installers drop their plugins into the Firefox program folder instead of keeping them in their own folders. To hunt these down, check:
C:\Program Files (x86)\OldFirefox\Plugins<br>
C:\Program Files (x86)\OldFirefox\browser\plugins
Any luck?