MUM, MANIFEST, and the associated security catalog (.cat) files, are very important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

Fixes an issue in which you receive an "HTTP 403 (Forbidden)" error when a client HTTPS request is sent to a Web application or Web service in IIS 7.5 or IIS 8.0. This issue occurs when the host Web application or Web service accepts self-signed certificates for validation.

Fixes an issue in which recycled files are deleted permanently if you delete files from a DFS link in a network environment on a client computer that is running Windows 7 or Windows Server 2008 R2 after you redirect the Recycle Bin to the DFS link.

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.

Fixes an "HTTP/1.1 500 Internal Server Error" error that occurs when you try to download a large file from a website in IIS 7.5. This issue occurs if the SF_NOTIFY_SEND_RAW_DATA notification is registered in an ISAPI filter.

Resolves a vulnerability in Windows Explorer that could allow remote code execution if a user visited a specially crafted webpage.

The manifest expiry feature is removed from all Active Directory Rights Management Services (AD RMS) clients. This is a design change to AD RMS for all supported Microsoft applications and Windows operating systems.

To help you keep your device secure, Windows Security monitors your device for security issues and provides a health report, which appears on the Device performance & health page. The Health report alerts you to common issues in four key areas and offers recommendations to remedy them.

Use this app to try to recover lost files that have been deleted from your local storage device (including internal drives, external drives, and USB devices) and can’t be restored from the Recycle Bin.

There are a number of possible explanations for why verification codes don't always arrive. Read through the list of the most common causes, and see if any of them apply to you, or use our troubleshooter to help guide you. Start. I'm not getting my verification code. What do I do?