A search will get you this info, but here goes anyway.
Download the update file. Extract it and findvthe two files updata.dat and unlmtd.cfg.
Newly format a micro sdcard (fat16 or 32, I prefere 16!). Create a folder called dload in the root of the card. Transfer the two previously mentioned files to this folder.
Turn your S7 off, insert the card and power on. Wait for the update process to complete. Remove the battery and power cable. Remove the the sdcard. Put the battery and power cable back in and power on.
I personally use the generic non country specific update C62B011.Watch out for that one as it boots in chinese, but can be easily changed to whatever language you use.
Here you go:S7V100R001C60B011->Multiupload.com - upload your files to multiple file hosting sites!