The configuration file for DOS systems. Whenever a DOS computerboots up, it reads the CONFIG.SYS file (if it exists) and executes anycommands in it. The most common commands are BUFFERS= andFILES=, which enable you to specify the buffer size and the number of files that can be open simultaneously. In addition, you can enter commands that install drivers for devices.
its not configsys,, it is "msconfigzz".. you can run msconfig from run..
registry
normal startup menu option
The config.sys tells MS-DOS which peripherals and devices are installed on your computer. Only in MS-DOS 4.0 or higher, may programs may be started in config.sys.
Both of these are legacy files and not really needed on current operating systems by microsoft. The autoexec.bat starts programs, and ran batch files. The config.sys loaded drivers and configured them.
In Windows XP (and probably later versions, but I haven't tried it on those), you would type "msconfig" -- without the quotes, of course.
Execute Autoexec.bat -NormalLoggedStep-by-Step confirmationCommand Prompt onlyPrevious version of MS-DOSDoes NOT execute Autoexec.bat -Safe ModeSafe Mode with network supportSafe Mode Command Prompt only
configsys.exe is used to make some programs on Windows computer to run properly, for example, allows you to use the configuration box without problems. Hence, it is not recommended to remove it from the computer. But sometimes, this process will make the computer to run slowly.