I have a Galaxy S3 phone with android version 4.1.2. I have not upgraded my phone recently nor have I rooted the phone.
This afternoon when I turned on my phone, I got a message saying "Android is Upgrading... Starting Apps" for a few seconds, then gave me my lock screen and a few seconds after I unlocked my phone, it automatically restarted. Since then, every time I restart my phone, I get that message for a few seconds before I get my lock screen, but it does not automatically restart my phone any more.
I currently do not have a photograph of the message nor can I find one online.
Most of the references that I have seen refer to rooting and dalvik cache, but I do not think this is the case since I have not rooted my phone and using the stock 4.1.2 for the Galaxy S3.
The most recent app that I installed was Cartwheel yesterday.
The only other problem I had was that a week or two ago, my phone seemed to have gone into 'Factory Mode' (see picture in the first post of the linked thread (not my actually phone). I seemed to have solved the issue by inputting
*#87976633# into the Dialer. You could see the solution (and an example picture in the first post in the thread) HERE.
I thank you in advance for any suggestions.