Automatic updates using windows Windows can updates automatically ,when you select the option on. In windows XP and Windows 7 are shown here Windows XP : Settings > Control panel > Security center Turn on Automatic updates choose the options you like. In windows 7: Control panel > System and security So how can do all users let updates on system. By default, Windows only allows users with administrator user accounts to install updates. To allow all users to install updates, follow these steps: Click to open Windows Update. In the left pane, click Change settings. Do one of the following: To allow standard users to install updates, select the Allow all users to install updates on this computer check box. To prevent standard users from installing updates, clear the Allow all users to install updates on this computer check box. If you use automatic updating for Important or Recommended updates, those updates are installed regardless of whether the current user is an administrator or not. Different types of updates Updates are classified as Important, Recommended, Optional, and Featured. Important updates offer significant benefits, such as improved security, privacy, and reliability. They should be installed as they become available, and can be installed automatically with Windows Update. Recommended updates address non-critical problems or help enhance your computing experience. While these updates do not address fundamental issues with your computer or Windows software, they can offer meaningful improvements. These can be installed automatically. Optional updates can include updates, drivers, or new software from Microsoft to enhance your computing experience. You can only install these manually. Depending on the type of update, Windows Update can deliver the following: Security updates. A broadly released fix for a product-specific security-related vulnerability. Security vulnerabilities are rated based on their severity, which is indicated in the Microsoft security bulletin as critical, important, moderate, or low. Critical updates. A broadly released fix for a specific problem addressing a critical, non-security related bug. Service Packs. A tested, cumulative set of hotfixes, security updates, critical updates, and updates, as well as additional fixes for problems found internally since the release of the product. Service Packs might also contain a limited number of customer-requested design changes or features. Types of updates can Windows install automatically You can set Windows to automatically install important and recommended updates, or to install important updates only. Important updates provide significant benefits, such as improved security and reliability. Recommended updates can address non-critical problems and help enhance your computing experience. Optional updates are not downloaded or installed automatically. To install drivers and other optional updates Click to open Windows Update. In the left pane, click Check for updates, and then wait while Windows looks for the latest updates for your computer. If you see a message telling you that important updates are available, or that optional updates are available, click either message to view and select the updates to install. Select the optional updates that you want, click OK, and then click Install updates. If you're prompted for an administrator password or confirmation, type the password or provide confirmation. Installing updates Control panel > System and Security > Widows update > Check for updates/check online updates After the installation how will I check the updates are installed? In win7 :- Start > programs > Windows updates or Control panel > Programs and features then view updates Remove an update To help enhance the security and performance of your computer, we do not recommend removing updates. Click to open Installed Updates. Click the update that you want to remove, and then click Uninstall. If you're prompted for an administrator password or confirmation, type the password or provide confirmation. If you want, you can reinstall the update later by going to Windows Update in Control Panel and checking again for updates. To stop Windows from installing or notifying you about an update, see Troubleshoot problems with removing updates. Note If you can't remove an update, your computer might be connected to a network where updates are managed by Group Policy. In other cases, you might not be able to remove an update because it applies to a security-related area of the operating system. If you think an update that you can't remove is causing problems, contact your system administrator or your organization's technical support group, or see Troubleshoot problems with removing updates. Restore and install hidden updates Hidden updates are updates you've asked Windows not to notify you about or install automatically. To enhance the security and performance of your computer, restore all important and recommended updates. Click to open Windows Update. In the left pane, click Restore hidden updates. Select the updates that you want to install, and then click Restore. If you're prompted for an administrator password or confirmation, type the password or provide confirmation. Windows will check for updates, and then prompt you to install the updates that you have restored and any new updates that might be available. Note Some updates that you try to restore might not appear in the list of updates that Windows offers you. This happens only when Windows finds a more recent update that addresses the same problem as the update you tried to restore. .