No network access to pc after latest firmware update

Have you reset the player after the update? You may also try to rollback to the earlier firmware, then reapply the update. You can find previous firmwares in the following link:

http://wdc.custhelp.com/app/answers/detail/a_id/5860/session/L3RpbWUvMTMyNjYzMTAyMi9zaWQvYWZ5czljT2s%3D