I've not had this on this tablet, but it happened with my old Asus Slider sometimes. Two options: 1. downloaded from a less than reputable source and the tablet caught a virus. 2. apps with update failure.
Might install a freeware antivirus/malware program like AVG..
Acer Iconia A700 CM11
Samsung Galaxy Note Pro 12.2 Stock (for now...)
HTC One X Team Venom ViperXL