There is a Vulnerability in Windows Explorer Could Allow Remote Code Execution, but the best news of all is for all of those people who are still running Windows 98. Guess what, folks? You're unsuported, as Microsoft won't fix the vulnerability. Now, true, this is an 8 year old operating system, but it's also one of the most popular Windows versions out there. Too bad.
Interesting to note, there's still a dedicated group of people who are still supporting Redhat 7.3 (which was released in 2002) called Fedora Legacy. Redhat 5.1 was released around 1998. Sure, there's nobody actively supporting 5.1, but the difference is there's precious few people still using Redhat 5.1. There's hundreds of thousands of users still using Windows 98. Perhaps now is the time to consider switching your OS?