According to the Microsoft DST web site, Windows 2000 has passed the end of Mainstream Support, therefore only customers with Extended Hotfix Support can obtain the Windows 2000 hotfix. 

If you are counting yourself (as 99% of small businesses do..) without that "Hotfix Support Agreement", do not despair!  Microsoft will allow you to purchase a kit including all DST update tools for a mere $4,000.00, what a deal! 

For the more "economically challenged" among us, there are a few other options that will allow you to deal with resolving issues with Day light Saving Time updates for Windows 2000.

Option A:  Update your clock Manually
Adjust the system clock manually four times each year:

1. In mid-March, when the new rules start, set forward the clock by one hour.

2. In early-April, when the old rule would have started DST, the clock will need to be set back one hour. This is necessary because the change will already have been made manually three weeks earlier, so the change programmed for April must be cancelled.

3. In late-October, cancel the programmed clock adjustment by setting the clock forward one hour ( DST now runs for an additional week)

4. Finally, in early November when DST now ends, set the clock back one hour.

Option B: Download the tzedit.exe tool using the link under Windows 2000 from the Preparing for daylight saving time changes in 2007 Microsoft web page at http://support.microsoft.com/gp/dst_topissues#A5

Unzip the files into a Windows program directory such as c:\Program Files\TZEdit
1. Exit out of applications.
2. Run the executable tzedit.exe using Start > Run, provide the full path, for example: c:\Program Files\TZEdit\tzedit.exe
3. Your current time zone should be highlighted. Click the Edit button.
4. Set Start Day to Second Sunday, March.
5. Set Last Day to First Sunday, November.
6. Click OK.
7. Click Close

You need to change your time zone twice using the Windows Date and Time Control Panel.
1. From the Start menu, click Settings > Control Panel and then click Date and Time.
2. Click the Time Zone tab.
3. Select a different time zone and click Apply.
4. Now, select your time zone and click Apply, then click OK.
5.Restart your applications.