Introduces a Group Policy that enables and disables Microsoft HTML Application (MSHTA) files. Addresses an issue that affects the App-V client service. The service leaks memory when you delete App-V registry nodes.

This article describes how to start the Program Compatibility Wizard. The Program Compatibility Wizard prompts you to test your program in different modes (environments) and with various settings. Click Start, and click Help and Support item in the start menu.

Resolves vulnerabilities in Internet Explorer that could allow remote code execution if a user uses Internet Explorer to view a specially crafted webpage.

Resolves vulnerabilities in Internet Explorer that could allow remote code execution if a user uses Internet Explorer to view a specially crafted webpage.

Resolves several reported vulnerabilities in Internet Explorer that could allow remote code execution if a user views a specially crafted webpage in Internet Explorer.

Use the Quick Assist web app to get help with your computer directly from Microsoft support agents. The app connects your computer with the Microsoft support agent’s computer using a remote connection. The Microsoft support agent will give you a security code—enter it when prompted.

Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.

There are different ways to remove apps and programs, so if you can't find the one you're looking for, you can try another location. Note that some apps and programs are built into Windows and can't be uninstalled. You can try to repair a program first, if it's just not running correctly.

Use this tool to find and remove specific prevalent threats and reverse the changes that they made (see Covered malware families). For comprehensive malware detection and removal, consider using Windows Defender Offline or Microsoft Safety Scanner.

Microsoft Internet Explorer 9 reached the end of support on January 14, 2020. Some customers using Windows Server 2008 R2 SP1 who activated their ESU multiple activation key (MAK) add-on before installing the January 14, 2020 updates might need to re-activate their key. Re-activation of affected devices should only be required once.