unable to start device celkon a354c

i have root ,my device with king root pc verson ,after that i unistall some system application like
1)flashlight
2)keyboard
opera mini
etc.
and i place some application in I>system>app
and restart the phone to save changes
after starting phone it start normally and says that android is checking file system .
after that dialogue box shows that unfortunatly system.ui has stop working.
pressing ok it shows that launcher3 has stop working.
because of android launcher stop working i am not able to draw apps and interfare and this countiniously pop up
and the usb dubbage mode is on luckly.so it can interfare with pc.
please help me
to fix this and start my phone