Prepare Your Windows Domain for DST 2009

Posted on February 25th, 2009 in Excahnge 2000, Excahnge 2003, Excahnge 2007, Microsoft, Office 2007, Outlook 2002 XP, Outlook 2003, Outlook 2007, Server 2003, Server 2008, Vista, WSUS, Windows XP by Gil Kreslavsky

As you probably know Microsoft releases set of DST patches for their systems every year at December .
To avoid DST calendar issues  make sure to install/deploy the following updates to entire organization.


The country that was skipped in MS  Day Light Saving update are Argentina/Brazil and Chile.

  • Daylight saving time begins: October 19th, 2008
  • Daylight saving period ends: March 15th, 2009

Since the new dates published by the federal are different from what was defined in the initial years, Windows-based computers am able to not correctly interpret the time such a is related to the transition to daylight saving time.

General recommendations

  • There is no hotfix to be had at this time to update MS Operating Systems with the 2008-2009 DST dates for Argentina.
  • Please note that if you adjust the machine’s clock manually, you may have adverse effects on your environment.
  • Before applying the changes on Windows Operating Systems to reflect the change in Daylight Saving Time in Argentina, be aware of possible issues that am able to affect Microsoft Office Outlook and Exchange Server.
  • Contact Microsoft Support prior to any modification if you are unsure about the steps to emulate in condition to be prepared for the Daylight Saving Time change in Argentina.

Impacts for Outlook clients and Exchange

  • For the year 2008-2009, customers paying for the ‘(GMT -3:00) Buenos Aires’ minute zone have a delta period at the start on of the DST as follows:
    Delta-Argentina-BuenosAires
    From Sunday, October 19th, 2008 to Saturday, December 28th, 2008.
  • And for customers using the ‘(GMT -3:00) Georgetown’ time zone have a delta range that comprehends the whole DST period:
    Delta-Argentina-GeorgeTown
    From Sunday, October 19th, 2008 to Saturday, December 28th, 2008

As result appointments may be off 1 hour. This may happen for both recurring and single-instance appointments.
The appointments created in the wake of the DST dates have been updated on the operating system will have the correct time.

Read More about Argentina 2008-2009 DST at MS Blog

Read More about Brazil 2008-2009 DST at MS Blog

Read More about Chile 2008-2009 DST at MS Blog

Update KB931836 fails to install

Posted on January 10th, 2008 in Microsoft, WSUS by Gil Kreslavsky


Update KB933360, makes update KB931836 to fail

Go to Start >Control Panel > Add remove programs

Mark Show updates.

Find KB933360 and press remove.