Oh, please! What have you tried??? Probably nothing. All the information/resources you need are in this forum. Use the search button man. You even know what to do:
Flashtool and Firmware please
What do you expect from us? To give you the link of the desired files? A quick Google search will give you everything you need.
Have a nice day.
I'm back! Xperia E owners: be prepared for upcoming awesomeness