The corrupted .INI file was probably due to having edited it by hand, mabye a long time ago, to create a log file for troubleshooting.
About the installer stopping at soundai.cfg, nobody else reported this, and it simply cannot happen: it's just a simple text file. I could imagine the antivirus interfering with installing an executable, but surely not that file.
Are you sure you have enough disk space BOTH on the destination folder AND on the Windows folder ? The installer will first uncompress itself in the Windows %TEMP% folder so, even if you have plenty of space on the final installation folder, the installer might have issues if you are low on space on the Windows temporary folder.
You might try running the windows wizard utility that helps freeing unused space, it might be enough to fix the problem.