LG870 boost mobile stuck on loop, Help

[AC Question]

Hi,
I am very new to rooting, in this case i dont want to root as well. the problem is that my phone was showing errors as ".com android !@@####!$E" is stopped error and i couldnt use the phone, hence i tried internet and did the cache wipe and system reset from recovery mode and since then the phone is into start page loop. Not sure what to do , Please help

Thanks