I use W98SE exclusively on my shop computer and the wheel mouse works . . .mostly . . . you have to tell the mouse software to work in MCS . . .and sometimes it forgets.
Neither my Toshiba laptop nor my mouse software offer any such option. However, IIRC, the wheel works on an older desktop that also runs W98Se so I guess it's more a matter of the PC & mouse rather than the OS.
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