I hate doing hard resets, often flippantly suggested by support staff when they are too lazy, or unable to find a fix. They also frequently fail to mention to backup everything possible as everything will be wiped out.
TRY THIS BEFORE DOING THE HARD RESET: Power Off / Power On
When this error message popped up, I tried powering off and then on again as usual - everything was back to normal. This has happened several times lately, but it seems nothing is missing or unaccessible so far, but this message may indicate that there is a problem somewhere in the device and a major crash may happen soon.
Not sure if there is any connection, but since the last upgrade to 4.4.2 and/or Verizon update which replaced the nice blue/purple & lightshow Samsung splashscreen to a blindingly white, lingering one showcasing Verizonwireless, I've been having problems with my battery getting extremely hot whether it's being charged or not. Also delayed response to touch commands... The last Verizonwireless update replaced the blinding, ugly splashscreen with a garish lingering red one, but still having delayed response and hot battery/charging problems.