Fix for Windows Update Error 80070490 summary
KB4578956 updates Windows 10 and Windows Server 2019 to improve reliability, security, and overall performance. This cumulative update includes improvements for compatibility with third-party software and hardware, resolves known issues in earlier releases, and addresses vulnerabilities identified through Microsoft’s security research efforts. The update also enhances the stability of Windows Update components to ensure a smoother installation experience across different deployment scenarios.
This update package contains updates for non-security related issues that have been discovered since the release of the last quality update for Windows 10 version 20H2 and Windows Server, version 2004. It includes improvements in various aspects such as networking, accessibility, and the Windows Subsystem for Linux (WSL). The security updates included address vulnerabilities affecting Microsoft Windows, Internet Explorer, EdgeHTML, and other components of Windows, which could potentially allow remote code execution or elevation of privilege if successfully exploited.
KB4578956 addresses Error 80070490 with updates to system files and security patches
This update resolves several issues including:
- An issue where a user might receive an error message when trying to create a new contact group in Outlook on the web.
- A problem that causes apps running under WSL2 to have network connectivity issues when the system is set to use a proxy server for internet connections.
- Improves compatibility with certain third-party hardware and software solutions by addressing driver conflicts and API limitations.
This cumulative update also addresses security vulnerabilities affecting various components of Windows such as:
- CVE-2021-34527: A remote code execution vulnerability exists when the Microsoft .NET Framework does not properly validate user input. An attacker who successfully exploited this vulnerability could execute arbitrary code in the context of the current user.
- CVE-2021-34569: An elevation of privilege vulnerability exists in Windows that could allow an attacker to elevate their privileges on a targeted system if they are able to log on locally and run a specially crafted application.
Howto install KB4578956
To install KB4578956, follow these detailed steps:
- Open the Settings app by clicking on its icon in the Start menu or searching for it using Cortana.
- Select Update & Security.
- Click on the Windows Update tab and then click Check for updates.
This may take a few minutes to complete. Once finished, Windows will inform you if an update is available. - If KB4578956 appears as one of the optional or recommended updates, select it.
Note: If the update does not automatically appear, it can be manually downloaded from the Microsoft Update Catalog. - Click Download and install to proceed with the installation process.
- FOLLOW INSTALLATION INSTRUCTIONS PROMPTED BY WINDOWS UPDATE.
- If the update is available through Windows Server Update Services (WSUS) in a corporate environment, consult your system administrator or IT department for instructions on how to download and deploy KB4578956.
After installation, reboot your computer to complete the update process.
Similar questions
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