If you're looking for a program that makes the daylight saving time updates on Windows NT and Windows 9x machines, look no further. David Gray has written a program, 2007TZFIX, that updates any version of Windows that shipped since August 24, 1995, which means it updates Windows 95 and later. (It doesn't update Vista because that OS ships with the updates.) You can download the 2007TZFIX program from WizardWrx. The program is free to individual and small business users. David is asking for $75 from large organizations, but, as is always the case with shareware, you're on your honor to pay.
If you're unfamiliar with the daylight saving time changes (which take effect on Sunday, March 11) or why it's important to update your Windows OSs, you might want to check out the following: