Microsoft Security Updates - available for Windows 98 & other older OS's
Microsoft has promptly rolled out protective security updates for Windows 98, ME, and other older Operating Systems. This includes protection for security exposures found in both Windows and Internet Explorer. I successfully updated our older W/98 family PC and this process worked well.
Microsoft Security Bulletins - April 2005
http://www.microsoft.com/technet/security/Bulletin/ms05-apr.mspx