As you probably know the move from Daylight Saving Time (DST) back to Standard Time generally happens on the last Sunday in October. Although, from now on it will be the first Sunday in November.
Your computer and older electronics that are designed to automatically handle DST using the older standard might have already set themselves back and an hour last Sunday morning. This means you will have to reset them twice.
This is all part of the Energy Conservation Act of 2005, which is designed to save energy (there is an estimated savings of about 1% because of the change). Its also worth noting that the 'spring forward' part of the DST also gets changed next year to March 9th.
To find out how your Microsoft operating system or applications might be effected by the new DST, go to the following web site. There is a web based questionnaire, that will direct you right updates for your software.