See Windows Security notifications. Security intelligence sometimes referred to as "definitions" are files that contain information about the latest threats that could infect your device. Windows Security uses security intelligence every time a scan is run. Microsoft automatically downloads the latest intelligence to your device as part of Windows Update , but you can also manually check for it. How malware can infect your PC. Microsoft Security help and learning. Need more help?
Expand your skills. Get new features first. Was this information helpful? Yes No. Thank you! Any more feedback? The more you tell us the more we can help. Can you help us improve? Resolved my issue. Clear instructions. For more information see: Protect yourself from phishing. Use a pop-up blocker with your internet browser - Pop-up windows are small browser windows that appear on top of the website you're viewing.
Although most are created by advertisers, they can also contain malicious or unsafe code. A pop-up blocker can prevent some or all of these windows from appearing. The pop-up blocker in Microsoft Edge is turned on by default. If you're using Microsoft Edge, make sure SmartScreen is turned on - SmartScreen in Microsoft Edge helps protect you from phishing and malware attacks by warning you if a website or download location has been reported as unsafe.
For more info, see What is SmartScreen and how can it help protect me? Pay attention to Windows SmartScreen notifications - Be cautious about running unrecognized apps downloaded from the Internet. Unrecognized apps are more likely to be unsafe. When you download and run an app from the internet, SmartScreen uses info about the app's reputation to warn you if the app isn't well-known and might be malicious. Keep Windows updated - Periodically, Microsoft releases special security updates that can help protect your PC.
These updates can help prevent viruses and other malware attacks by closing possible security holes. Windows Update helps to make sure that your PC receives these updates automatically, but you may still have to restart your machine occasionally for the updates to install completely. Use your internet browser's privacy settings - Some websites might try to use your personal info for targeted advertising, fraud, and identity theft.
All modern browsers have privacy settings that you can enable to control what sites can see or do. In the window that opens, select the Triggers tab, and then select New. Sometimes you may need to briefly stop running real-time protection.
While real-time protection is off, files you open or download won't be scanned for threats. However, real-time protection will soon turn on automatically again to protect your device. Switch the Real-time protection setting to Off and choose Yes to verify. How malware can infect your PC. Microsoft security help and learning. Security Windows 10 Windows 11 More Windows 10 or 11 in S mode Some features will be a little different if you're running Windows 10 or 11 in S mode.
Need more help? Expand your skills. Get new features first. Was this information helpful? Yes No. Thank you! Any more feedback? It features a simple interface with many customizable options:. Download multiple files at one time Download large files quickly and reliably Suspend active downloads and resume downloads that have failed. Yes, install Microsoft Download Manager recommended No, thanks. What happens if I don't install a download manager?
Why should I install the Microsoft Download Manager? In this case, you will have to download the files individually. You would have the opportunity to download individual files on the "Thank you for downloading" page after completing your download. Files larger than 1 GB may take much longer to download and might not download correctly. You might not be able to pause the active downloads or resume downloads that have failed.
Microsoft Security Essentials provides real-time protection for your home or small business PC that guards against viruses, spyware, and other malicious software.
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