Himem.sys
Updated: 11/12/2023 by Computer Hope
The himem.sys is a driver file first included with MS-DOS 5.0 and included with Windows up to Windows 98 that manages extended memory. Versions of Microsoft Windows after Windows 98 only utilized the memory manager included with Windows. To load the himem.sys, add the following lines into your config.sys.
DEVICE=C:\Windows\HIMEM.SYS DOS=HIGH,UMB DEVICE=C:\Windows\EMM386.EXE NOEMS