A. Start the Date/Time control panel applet, select the 'Time Zone' tab and unselect the "Automatically adjust clock for daylight saving".

It can also be done directly in the registry

  1. Start the registry editor (regedit.exe)
  2. Move to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation
  3. From the edit menu select New - DWORD value
  4. Enter a name DisableAutoDaylightTimeSet and press enter
  5. Double click the new value and set to 1. Click OK
  6. Close the registry editor