Why WinZip may not open your .cab file

WinZip opens CAB files that are in the Microsoft standard CAB format. Here are several possible reasons WinZip might display a message that a file that seems to be a CAB file is "not in the standard Microsoft CAB format":

If you are certain that the files you are trying to process are standard CAB files, and WinZip cannot open them, please send information on how to obtain a copy of one such file to Technical Support.