There are actually a slew of updates and fixes for Windows 98 and 98 SE that have been released over the years. Some are official, and others are not. Below are a few links to maybe help you out. Also, I'll provide a link to WinWorld, which is a valuable resource for old OS's that can be a pain to find sometimes.

https://www.mdgx.com/web.htm#SP1

https://www.mdgx.com/upd98me.php

https://www.htasoft.com/u98sesp/

https://www.majorgeeks.com/files/details/unofficial_windows98_se_service_pack.html

https://winworldpc.com/

Hope this helps!