android marshmallow update issues

[Loulis Feminatus]

after android marshmallow at lg magna it has restarted and then it pops up a message " The android starts... app optimization etc" and then it restarts automatically. after the restart i keeps doing the same since yesterday

 

[shahbaz200]

Turn off device, press and hold volume down and power key. When LG logo appears release power key and keep pressing vol down key. When menu appears release vol down key. Navigate to "Wipe Data/Facotry Reset" by volume keys and select it power pressing power key. Your data on phone will be WIPED. Then restart it.