Another MS patch has been released today.

Security Update, March 7, 2002
834 KB/ Download Time: < 1 min
This update resolves the "Unchecked Buffer in Windows Shell Could Lead to Code Execution" security vulnerability in Windows 98, and is discussed in Microsoft Security Bulletin MS02-014. Download now to prevent a malicious user from running programs on your computer.

Visit http://windowsupdate.microsoft.com/ to get it.