Windows98 SE
If you are still running this version of Windows or have an old machine for backup you had better have updated it before it was no longer supported by Microsoft. If the system crashes and you have to reinstall the OS, the updates are no longer available from Microsoft.
Fear not - I just became aware of
this site. I can't guarantee the site as I haven't used it. So - use it at your own risk. Fortunately, I took the time to update two Win98 boxes I have kicking around here before the cutoff date.