On an updated Windows 98 SE installation, opening NetTimeSetup-320a3.exe fails with "This program does not support the version of Windows your computer is running."
Version 3.14 installs and runs just fine on Win98, from what I can tell so far. It's possible something like KernelEx might allow the newer installer to run, but that's not something I've installed or worked with yet.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
It might be that I updated the installer to a newer version which doesn't support Windows 98, but I don't remember doing so.
What happens if you try to install version 3.14?
Version 3.14 installs and runs just fine on Win98, from what I can tell so far. It's possible something like KernelEx might allow the newer installer to run, but that's not something I've installed or worked with yet.