[Android] Regrettably the process "xxx.xxx" has been closed"

Well, I got an Android 4.2.1 phone, a Nyx Sky HD (chinese, I think), it's the factory rom without any modules (no gravity box, etc), only rooted, well the issue is as it follows:
Phone starts okay, inmeadiately after booting it asks me to verify my whatsapp account, this is repeated countles times, after a certain amount of time using it it starts closing down other process running, until it eventually closes the OS and freezes, then I reboot itand it's the same thing all over again, when I tried to uninstall app (because I think the cause of the problem may be a corrupt app actualization), and delete temporal data, then reboot, phone returns to a previous point with all the apps that were unninstalled still there and Chrome stuck on the same page as it was left when the whole thing started to fail.. (and this repearts ad nauseum)
So, any ideas as to what is causing this? Googling doesn't yield any useful results, I've been thinking of doing a factory reset.. Could this be solved without a full reset?

[Android] Regrettably the process "xxx.xxx" has been closed"