How to unroot Galaxy y..

First Switch off your phone..
Then boot to recovery mode...
by pressing volume up + home + power button simultaneously....
then go to install zip from sd card...
then choose zip from sf card ...
then select upate-unroot.zip...
then reeboot...
Enjoy...¡¡!!

Download link of update-unroot.zip

http://db.tt/xsOAgjak