[Q] Persistent google play service followed by gapps crash topic

Hi guys I have a 18 month old Canvas HD A116, rooted since 6 months. Till 2 weeks i had no problem at all while flashing & using ROMs and all other benefits of rooting. I was using the same rom since 3 months but since 2 weeks i am having a consistent crash problem... during playing a game or browsing or anything, just out of nowhere messages pop up rapidly 'google+ has stopped working', 'chrome has stopped working' and many more followed by gapps has stopped working. after rebooting the same thing occured over and over again. Frustrated, i unrooted and flashed stock rom via sptools but then too its repeating again and again that google play services has stopped working, all the other google and system apps stopped working and finally gapps has stopped working...on rebooting i got an encryption unsuccessful message with option to reset phone which i did but to no avail.. after booting everything is normal for a minute or so & then the crashes start. I tried signing out of my google account and signing in again but no difference. Can someone help me out here? i just dont know what to do...