IFSHLP.SYS was first introduced in Windows for Workgroups 3.11.

IFSHLP.SYS is the 32-bit Installable File System Helper which assists in trapping real-mode file system and network-related API calls of Windows, bypassing the 16-bit DOS API.

If installing Windows for Workgroups, IFSHLP.SYS will need to be loaded.

Windows 3.x will require the long filename support (LFN) to be disabled, otherwise Windows 3.x can crash.For some systems, the EMS/UMB memory driver, EMM386.EXE, may also be required.Windows 3.x requires the XMS/HMA memory driver, HIMEM.SYS to be loaded in CONFIG.SYS.Installing MS-DOS 7.1 DOS Long Filename (LFN) Support Enable/Disable Disable DOS Long Filename Supportīecause if it’s proper DOS, it is gonna need Windows 3.1. The MS-DOS 7.1 installation CD includes a number of DOS add-ons, such as: MS Backup, MS Anti-Virus, Norton Utilities 2002 for DOS, many ISA/PCI sound card drivers, QuickView Pro, MPXPLAY, and Volkov Commander. MS-DOS 7.0 (Windows 95 RTM), MS-DOS 7.1 (Windows 95 OSR2.x and 98), and the crippled MS-DOS 8.0 (Windows ME) were never released by Microsoft as standalone products. MS-DOS 7.1 (CDU) is a custom compilation, by the China DOS Union of MS-DOS 7.1 from Windows 95 OSR2.x and 98, combined with various utities. Being curious of this MS-DOS 7.1 beast, I took it for a spin. Back in the day, Windows 95 and 98 could make great floppy boot disks that would support CD-ROM drives and vfat filesystems, while still being DOS. However to my absolute surprise I discovered a team of people have put together an unofficial MS-DOS 7 distribution. Windows 95 and 98, being the spiritual successors of MS-DOS 6, are not unfamiliar to me. So is looking to get an MS-DOS 6 system setup for running masm. I was looking to do some Assembly language programming using masm, the assembly language tool I learned on in College.

Dos 7.1 boot disk img file