Service Pack 2 (SP2) or subsequent updates can sometimes damage or delete files in Windows XP that are needed to run programs written for earlier versions of Windows. When these files have been damaged in Windows, installing or running a program may fail (stop running) or may produce an error that refers to the "16-bit MS-DOS Subsystem". This error may indicate that "The system file is not suitable for running MS-DOS and Microsoft Windows applications."
The CTI Navigator installation program is not an MS-DOS file but it is written to run in all versions of Windows - not just XP or Vista. Therefore, installing the CTI Navigator program (see note 3) may fail or trigger the above described 16-bit error if Window's install files have been damaged. CTI has written a simple patch to restore three critical files (Config.nt, Autoexec.nt, and Command.com) when damaged or missing in Windows.
To fix these damaged Windows files:
Note 1: You can use Windows Explorer or the Search function in Windows to determine if these three files exist in the i386 directory on your computer and, if so, whether they are compressed or uncompressed. The compressed file names end with an underscore mark (Config.nt_, Autoexec.nt_, and Command.com_). Compressed files must be expanded before they will function properly. You can assume that if you find one of these files, the other two files are also in the directory and are in the same compressed or uncompressed format.
Note 2: If the 16bit patch does not work or if you do not have either your Windows disks or these files in an i386 directory, the following Microsoft sites describe how to manually restore these files.
Note 3. If the CTI Navigator program installs okay, but installation of Photos fails, click here > select the Unlock Photos button for your MLS > click Run > Start > after "Clear Read Only" completes, update CTI Navigator > re-install photos from the installation CD. The 3-letter code for your local MLS can be determined by opening the CTI Navigator login screen > click the Setup button > your MLS code is the first 3 letters in the Internet Server Address box (or contact CTI for your MLS code).
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