Microsoft says "While the year 2000 issues discovered in Windows 98 result in the incorrect display of dates in 2000 in certain rare scenarios, they pose no risk of data loss. Most customers would have an extremely small chance of ever running into these issues in their normal, daily computer use."

You can download the Y2K patch directly via Windows Update, but for more information about this patch (and even a phone number to order it on CD), point your browser to: http://www.microsoft.com/windows98/highlights/Win98Y2K.asp