Micromax Canvas A311 — Hanging and unwanted apps auto download

My phone which is a canvas nitroA311 is having frequent problems regarding slowing up of phone due to some apps like time survice, guard service, security plugin, adobe air, monkey test etc...and there is problems regarding auto installing of many apps like N locker, and many others. the problems cannot be fixed even after reseting the phone. this is creating much more problems while using internet.