I also am having a problem with UltraISO. When creating a new ISO for the Avast BART CD, I use UltraISO to add files to the compilation. Recently, the CDs created from these ISO files have failed to boot. I looked at the files in the ISO and see that the "winbom.ini" in the root has unrecognizable characters. If I create a new ISO without adding files with UltraISO, the winbom.ini file is not corrupt and the cd will boot. I have the latest versions of both software packages installed. Any help resolving this dilemma is greatly appreciated.