Each release of the tool helps detect and remove current, prevalent malicious software. This malicious software includes viruses, worms, and Trojan horses. Microsoft uses several metrics to determine the prevalence of a malicious software family and the damage that can be associated with it.

Microsoft Defender Antivirus is a powerful tool that finds and removes malware from your PC. Here's how to use it in Windows 10 or 11 to scan your PC. Important: Before you use Microsoft Defender Offline, make sure to save any open files and close apps and programs. Open your Windows Security settings.

A remote code execution vulnerability exists in the way that Windows handles objects in memory. To learn more about the vulnerability, go to CVE-2018-8136 .

Press and hold (or right-click) on the program you want to remove and select Uninstall or Uninstall / Change. Then follow the directions on the screen. Need more help? If you can't find an app or program, try the tips in See all your apps in Windows 10 and Program is not listed in add/remove programs after installation.

This article describes an issue that occurs when you enter characters in the Search box on the Index tab in a Compiled HTML Help (.chm) file in Windows 8.1, Windows RT 8.1, or Windows Server 2012 R2. An update is available to fix this issue.

PC Health Check app brings you up to date info on your Windows device health, helping you take action to improve your device performance and troubleshoot performance problems. It is periodically updated based on customer feedback to help you make the most of your Windows PC. How to open PC Health Check.

How to add a file type or process exclusion to Windows Security. Microsoft security help and learning. Find out how to stop Windows Security from alerting you about or blocking a trusted file, file type, or process, by adding it to the exclusions list.

Refunds for digital games include Microsoft Store digital game offers, Xbox apps (excluding movies and TV apps), digital gaming bundle offers, digital game durable content, and some digital game consumable content, whether made available through the Xbox console, on your PC, or on your mobile device.

Activate Office. Activate Windows. Find your Windows product key. Windows 11 system requirements. Windows 8.1 end of support. Find your hardware warranty. Meet Microsoft Copilot. Achieve anything you can imagine with your AI companion in the apps you already use every day. Start your Copilot journey. Explore.

Download and install or reinstall Office 2019, Office 2016, or Office 2013 - Microsoft Support. Office 2019 Office 2016 Office 2016 for Mac Office 2013. If this is the first time you're installing Microsoft 365 you may have some setup steps to do first. Expand the learn more section below.