We’ll all save an extra hour tonight, but does your computer know this? Companies 
typically have servers updating the network computers for the time change, but individual computers won’t be ready unless it has the latest updates.
To ensure your PC is ready for the time change, get the latest Windows updates by going to the Windows site.
Mac users may get the latest updates at the Apple site.
What if your computer time is an hour off? Your e-mail software, such as Outlook, will keep inaccurate calendar and e-mail times and your Palm, Treo, Blackberry, or other handhelds might also keep inaccurate time records. If your computer time is inaccurate for a long period of time, it could degrade the performance of the computer over time due its time compatibility with other programs.