Please try temporarily disabling your antivirus scanner to see if that makes a difference. We've seen AV scanners interfere with creating self-extracting archives in the past so it's worth testing that first.
Currently I do not have an antivirus installed. I just did a fresh reinstall of Windows 7 Ult SP1 [32-bit]. The only antivirus I have running is Windows Defender, which I did turn off. Thanks for the advice.