Its been sometime i've been on ubuntu...
And i start to realise, my kernel update has been piling up on my grub boot list.
Uninstalling it doesnt help in removing the grub list, and i dont keen to edit the grub configuration manually...
So, i went on googling as usual, and found this post:
And to my amazement, i found an application alike "ccleaner" in windows...
Its an amazing piece of work :)
Well done to the developer :)