From TechRepublic:
No major disruptions were reported due to daylight saving time starting earlier than usual on Sunday, though some people are experiencing technology glitches.
The bulk of the problems arose for people who had not updated their computers or had decided to postpone patching to the last minute, according to Microsoft, which created a dedicated “DST Support Central” to help customers. The symptom: clocks running an hour behind because they did not automatically adjust.
“This is more a nuisance issue,” said Rich Kaplan, the Microsoft vice president in charge of handling daylight saving time issues. “We had phone calls. There were people who had not applied the updates yet, so they wanted some clarity. There were no calls that said infrastructure was down, data was lost or any of those things.”