The “Program too big to fit into memory” is not a new issue in the older OS version
like Windows 95, NT and machine. It is due to the error of installing OS, the partition
compatibiliy, and BIOS. Installing the new OS is maybe the major source of this issue
that the compatibility of machine to the version of OS was not acceptable. Some
scenario is when the old computer which has a 192 mb of memory, 3 GB hardisk and
Pentium II and if you install the higher version of OS like Windows XP, the issue
will probably encounter by the user.

The temporary solution is to rename the extension name of Config.sys and Autoexec.bat to .ch
and reboot the computer. And you can test and update the normal configuration, (installing
new application, etc.) if the issue is fix.