The best replacement for win98 is win98se.

The best alternatives to win98 are rated as following:
★★★★★  win98se
★★★★★  winxp
★★★  winme
★★  win2000
★  win me
★  win2k
  win95
  winnt
  win 95
  win xp

Your alternative for win98 is not listed? Suggest!
Speaking about win98, one probably shouldn't forget about winxp.

Other search terms related to win98 and their ratings are:
★★★★★ winxp
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