Things You'll Need
Instructions
Download an ISO checker compatible with Wii data. Two such programs can be found under Resources.
Double-click the downloaded file to unzip and save the file to your desktop.
Navigate to the ISO file you wish to check. Right-click the file and choose "Open With." Navigate to the ISO checking program saved to your desktop and double-click.
Wait for the file to load in the program. Some programs will display a message immediately declaring that the data is either good or bad ("Checksum Passed" or "Checksum Failed"); others require that you click the "Verify" button in the software&'s main window to check the code.