Many installed apps crash after OTA update to Android 4.2 I had run over the air update from Android 4.1 to 4.2 on my Samsung Grand GT-I9082. It seems to have completed fine (screen with robot and progress bar for a while, then some messages about "optimizing" and "running" applications, then boot).

After update the phone itself works fine, however a lot of third party apps now crash on launch with "Application [name] has been stopped" (loose translation since my phone interface is not in English). It is consistent and specific to the app - either it always crashes or it just works normally. The one slight exception is Chrome which opens and closes immediately, but doesn't give the message.


Clearing cache for the app doesn't fix it
Uninstalling app completely and re-installing does fix it (so far - for those few I did it for)


What else can I try?

At this point I guess reinstalling every crashing app would fix them, but that seems very boring and menial option, not to mention losing settings and data in those apps where it's relevant.
If your device is rooted, and you have a custom recovery installed: Wipe the dalvik cache. Next boot will take a little longer (as the Dalvik cache has to be rebuilt), but the problem should be gone.

If the above is not an option, you could try to backup the affecgted apps and their data using e.g. Helium Backup, then uninstall the apps, and restore them (including their data) from their backup. This way their Dalvik cache would be rebuilt as well, you don't lose your data, and Helium can do that in a batch-process to save you a bunch of clicks.