Microsoft plans to patch a rare bug that affects date rollovers in Windows 98 discovered by a British Internet company that was testing the operating system for year-2000 compatibility.
If a Windows 98 machine is booted at the precise moment when the New Year date is rolling over, the date could jump forward two days, or back one day.
Windows product manager Kim Akers rated the probability of the bug happening at "one in six million," but nevertheless Microsoft is working on a fix.
The rollover window varies, depending on the speed of the PC, Akers said.
The flaw was discovered by Bromley Computer Systems, an English-based company.