The setup .INF file filename has a missing or invalid [Source Media Descriptions] section.
Most of the .inf files used by Setup have a [Source Media Descriptions] section that identifies the media that the source installation files, such as video adapter drivers, are on. If this section of the .inf file is missing or has a bad format, then Setup will not be able to find some of the files needed for installation.
Retry the Setup operation. If you get the same message, and you are running maintenance Setup, try replacing the file named in the message with the .inf file from the installation disk. You will have to decompress the file. Otherwise, contact the media vendor.