Here we are posting the Official Stock ROM for Samsung Galaxy S7 along with Installation Guide.
This Firmware is based on Latest Update of 28 June 2016.
Note: Before Going to Flash this ROM you have to Activate PIN in Secure StartUP (It will be asked after Successful Flash)
DOWNLOAD Galaxy S7 Firmware:
How to Flash/ Revert Back to Stock Rom On Galaxy S7:
Download Drivers From Here
Next Download ODIN v3.11.1 Flasher Software From Here
Extract and Copy it to your Desktop Folder or Somewhere
Now Reboot your Galaxy S7 into Download Mode (Press HOME + POWER and VOL Down Buttons Simultaneously)
Connect to PC and Open ODIN Software
Add the downloaded Galaxy S7 Stock Firmware on ODIN Software
Click on Start to Flash.
Wait for the Finishing and DONE.