If (1) 933360 is listed in Add/Remove Programs, (2) your Time Zone is
correct and (3) the Automatic DST option was enabled in Date and Time
Properties, and the machine didn't automatically adjust for DST, try syncing
Internet Time using time.windows.com [which BTW was ~2 minutes fast when I
synced with it earlier today]. If still no joy, open a free Support
Incident (see below).
If you've not already downloaded and run the OL 2003 TZD Update Tool, do so.
Not having done so should not be the cause of your system clock not
adjusting.
If Microsoft Update is not your default update source, I'd recommend making
it so or checking in at Office Update website monthly to make sure your
Office apps are fully patched.
Start a free Windows Update support incident request:
https://support.microsoft.com/oas/default.aspx?gprid=6527
Support for Windows Update:
http://support.microsoft.com/gp/wusupport
Customers in the U.S. and Canada can receive technical support from
Microsoft Product Support Services at 1-866-PCSAFETY. There is no-charge for
support calls that are associated with security updates. When you call,
clearly state that your problem is related to a Security Update and cite the
update's KB number (e.g., KB931678).
In other countries, see
http://support.microsoft.com/default.aspx?pr=securityhome > "No-Charge
Support...for virus and other security-related" issues in right-hand menu
for localized contact information.
For more information about how to contact Microsoft for support issues,
visit the International Support Web site:
https://support.microsoft.com/common/international.aspx