Loads a memory-resident program into memory when you start the operating system. You can use this command only in your CONFIG.SYS file.
Memory-resident programs stay in memory as long as your computer is on. They can be used even when other programs are active. You can use the INSTALL command to load operating system memory-resident programs.
INSTALL does not create an environment for a program it loads. Therefore, slightly less memory is used if you load a program with INSTALL rather than from your AUTOEXEC.BAT file. Some programs might not run correctly if they are loaded with INSTALL. Do not use INSTALL to load programs that use environment variables or shortcut keys or that require COMMAND.COM to be present to handle critical errors.
Order of CONFIG.SYS processing All INSTALL commands are processed after any of the DEVICE commands and before the command interpreter is loaded. You cannot load a memory-resident program before a device driver loaded with the DEVICE command.
Suppose you want to install FASTOPEN.EXE, located in the DOS directory on drive C, from your CONFIG.SYS file instead of from your AUTOEXEC.BAT file or the command line. In addition, you want to specify that FASTOPEN is to track the opening of up to 100 files and directories on drive C. Include this in your CONFIG.SYS file: