Here's a google find about it. https://msfn.org/board/topic/145982-using-more-than-512mb-ram-update-fix/
That fix was unofficial and Microsoft's answer from memory was to reduce RAM during install.
ASUS A7N8X-X, AMD Athlon XP 2000+, 2 GB RAM. 80 GB HDD.
Having trouble installing 98SE. When I get to the part where I reboot the computer, I have option to boot to HDD or CD. If I rboot to CD it just begins the install over again. If I reboot to HDD I get "Insufficient Memory to run windows (I have 2 GB RAM) Quit 1 or more Memory Resident Programs or Remove Utilities From Config.sys Autoexec.Bat and restart."
When I reboot to HDD the install should proceed to USER info, License agreement, Windows Product Key. It just gives me the above message. I tried other CD, and an official Microsoft Windows 98 install CD with the same result.
I think the problem might be that the CD/DVD burner/player is too fast. 24X. Its brand new. I switched to an older slower DVD/CD ROM with the same result.
I previously installed 98SE on this computer back in 2003. I have no problem installing Linux Mint 19.1 32bit on this computer. There is no linux on this drive.