Today, the Microsoft Security Response Center (MSRC) posted details about the April security updates.
If you have automatic updating turned on, most of these updates will download and install on their own. Sometimes you may need to provide input for Windows Update during an installation. In this case, you’ll see an alert in the notification area at the far right of the taskbar—be sure to click it.
In Windows 8, Windows will turn on automatic updating during setup unless you choose to turn it off. To check this setting and turn on automatic updating, open the Search charm, enter Turn automatic updating on or off, and tap or click Settings to find it.
Note: Support for Windows XP ends next week on April 8, 2014. As a result, technical assistance for Windows XP will no longer be available, including automatic updates that help protect your PC. Microsoft will also stop providing Microsoft Security Essentials for download on Windows XP on this date. (If you already have Microsoft Security Essentials installed, you will continue to receive antimalware signature updates for a limited time, but this does not mean that your PC will be secure because Microsoft will no longer provide security updates to help protect it.) Learn how to help stay protected.
If you are a technical professional
The Microsoft Security Bulletin Advance Notification Service offers details about security updates approximately three business days before they are released. We do this to enable customers (especially IT professionals) to plan for effective deployment of security updates.