Step 2. When you see the warning screen, hit the Volume Up button.
Step 3. When you see “Downloading” mode, connect a micro-USB cable from your Verizon Galaxy S3 to your computer.
Step 4. Download the rooted Stock ROM and ODIN, then unzip both zip files:
(UPDATE: Use the VRBLK3 for rooting latest)
Download Stock ROM with Root (This is for older software versions)
Download Stock ROM VRBLK3 with Root (Use this one!!!)
Step 5. Next go ahead and run the ODIN program by double-clicking on odin3 v1.85.exe.
You should see a yellow-highlighted box with a random number. If you don’t, download and install Samsung Kies then unplug/plug your Galaxy S3. You should now see it.