Microsoft Security Essentials provides protection against viruses, spyware, and other malicious software. Security Essentials scans your computer for threats and keeps out new threats. Security Essentials does not come installed on the computer, but is available as a free download from Microsoft.
NOTE:If you have antivirus software installed, but want to install different antivirus software, remove the old antivirus software before installing new software. This might prevent software conflict problems.
Downloading and installing Microsoft Security Essentials
Microsoft Security Essentials is available as a free download for all computers running a genuine version of Windows. Follow these steps to install Security Essentials:
- Click Free download .
- Microsoft detects your operating system and begins to download the options appropriate to your operating system.
- If a Security Warning window opens, click Run .
- If a second Security Warning window opens, click Run .
- On the welcome screen, click Next .
- Proceed through the steps to install Microsoft Security Essentials.
- When the installation is complete, click Finish .An Update screen displays, while Security Essentials scans the Microsoft site for the latest updates to virus and spyware definitions. Any necessary updates are installed on your computer. When the scan is complete, close the software.
Scanning the computer for security threats
Microsoft Security Essentials can perform a quick scan of the most common places threats are found, a full scan of the entire system, or a custom scan of the drives and folders you select. Follow these steps to scan the computer for security threats:
- To open Microsoft Security Essentials, click Start , All Programs , then click Microsoft Security Essentials .
- Open the Home tab.
- Select one of the scan options, and then click Scan now :
- Quick - Scans the folders most likely to contain security threats.
- Full - Scans the entire system.
- Custom - Scans drives and folders that you choose.
- Security Essentials scans the computer for security threats.When the scan is complete, a screen displays the scan results. If the scan finds threats, a list of those threats displays. If the scan does not find threats, a No threats were detected on your computer during this scan message displays.
Security Essentials can scan your computer automatically every week at the same time. Follow these steps to schedule a weekly scan:
- Open the Settings tab.
- Click Scheduled scan .
- Check the box next to Run a scheduled scan on my computer (recommended) .
- Select the scan type (Quick or Full), the day, and the time. Then, click the check boxes for the other scheduling conditions you wish to apply.
- Click Save changes . Security Essentials scans the computer weekly on the day and time set.
Microsoft Security Essentials overview
Opening Microsoft Security Essentials
To open Microsoft Security Essentials, click Start , All Programs , then click Microsoft Security Essentials .
The Home tab displays the status of real-time protection as well as virus and spyware definitions. You can perform a quick, full, or custom scan from the Home tab.
The Update tab displays the status of the virus and spyware definitions. Click Update to check for updates.
The History tab displays all the items that Security Essentials detects as potentially harmful and the action taken on each item.
Use the Settings tab to schedule a scan, set default actions, turn on or off real-time protection, exclude files, folders or processes, and manage Microsoft SpyNet membership. For more information, see Changing settings .
On the Settings tab, you can schedule a scan, set default actions, turn on or off real-time protection, exclude files, folders or processes, and manage Microsoft SpyNet membership. Use the following sections to change Security Essentials settings.
Changing scheduled scans
Security Essentials can run scheduled scans once a week. Follow these steps to change the scan type, day of week, or time of day:
Setting default actions
Security Essentials can automatically deal with security threats. Follow these steps to set the default actions that Security Essentials performs when it detects potential security threats:
Changing real-time protection settings
Real-time protection alerts you to potentially dangerous software as it attempts to install itself or run on your computer. Follow these steps to turn on or off real-time protection and change protection settings:
Excluding files and locations
You can exclude certain files and locations to speed up security scans. However, doing so may leave your computer less protected against security threats. Follow these steps to exclude files and folders from scans:
Excluding file types
You can exclude certain file types to speed up security scans. However, doing so may leave your computer less protected against security threats. Follow these steps to exclude certain file types from scans:
You can exclude certain processes (ending in .cmd, .bat, .pif, .scf, .exe, .com, or .scr) to speed up security scans. However, doing so may leave your computer less protected against security threats. Follow these steps to exclude certain processes from scans:
Changing advanced settings
Security Essentials allows you to change advanced settings, such as whether to scan archives and removable drives, create system restore points before cleaning the computer, and allow users to view the history. Follow these steps to change advanced settings:
Setting the Microsoft SpyNet membership level
SpyNet is a Microsoft online community that collects information about potential threats. With basic membership, the information can include where the software came from, actions taken, and whether the actions were successful. With advanced membership, Security Essentials sends all of the basic information plus the location of the software on the computer, the file names, how the software operates and the impact to the computer.
Follow these steps to set the Microsoft SpyNet membership level: