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I am trying to make a bootable SD card that has Windows 3.1 loaded onto it. I only have 2 computers with 1 and 8 GB of RAM. When I load Windows from C:\WINDOWS\WIN on my older 1 GB RAM computer (a netbook from 2008, the HP Mini 110-1030NR to be exact), it displays the splash screen for like 1 second because computers are so fast now, and then crashes to MS-DOS. I have not tested on my more-modern computer with 8 GB of RAM (the HP ProDesk 600 G1 SFF from 2013 or 2014, I'm not sure), and I have a 3rd computer (a Toshiba Sattelite C675D-S7101 from 2012) which does not boot from the SD card.

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    Do you need to natively boot into Windows 3.1? I can get it to work on DOSBOX with no issues and it can even read-write to the host's filesystem when configured correctly. I'm on a Dell Inspiron 7559 with 16 Gb of RAM, an i5 processor, and running Windows 10. – Nelson Feb 14 at 17:46
  • I can use a virtual machine if I can't figure out how to get the OS running on a newer computer, I am thinking of getting an old PC from the early 1980s to the late 90s – Claudia Burns Feb 14 at 18:28
  • @nelson DOSBox isn't perfect for Win3.1x use. For example, you need a development build if you want the installer for SimCity Classic Graphics to work with the Windows release of SimCity Classic. Otherwise, it can't enumerate your emulated floppy drives under Windows and it's fundamentally designed around the assumption of installing from a floppy. – ssokolow Feb 14 at 19:53
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The accepted answer to Windows 98 with 2GB of RAM should be adaptable for Windows 3.1:

This will ensure that Windows only sees 256MiB through the XMM, and should allow it to start and run.

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  • I added HIMEM.EXE to my C:\WINDOWS folder, and changed C:\DOS\HIMEM.SYS and C:\WINDOWS\HIMEM.SYS to C:\WINDOWS\HIMEMX.EXE /max=262144 in all of the config.sys files in the dos and windows folders, now windows is complaining that himem.sys doesn't exist, I couldn't find a .sys in all of the himemx folders I downloaded from your link in the original answer – Claudia Burns Feb 14 at 18:16
  • It sounds like the 256 MB limit is better described as a "practical maximum": you can give Windows more, but it will probably never be able to use it (and it will never use more than 512 MB). – Mark Feb 14 at 18:50
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    @Claudia try loading both HIMEMX.EXE and C:\WINDOWS\HIMEM.SYS (I thought the former would be enough, but perhaps not). – Stephen Kitt Feb 14 at 19:50

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