Fix for Windows Update Error 4577021 Summary
KB4577021 is an optional update released by Microsoft to address various issues and improve the stability and security of Windows operating systems. This cumulative update includes a collection of fixes that resolve known problems reported in earlier versions, as well as security updates designed to protect against potential vulnerabilities. The update applies to several editions of Windows 10, including Home, Pro, Enterprise, and Education. It is intended for IT professionals who wish to deploy these changes through their organization’s standard procedures or for individual users looking to manually apply the update on their machines. This update requires a restart after installation, as it installs new files that require system resources not available while Windows is running.
KB4577021 Updates Resolved: Description of Patched Issues and Fixes for Error 4577021
KB4577021 addresses numerous issues across various components of the operating system including, but not limited to:
1. **Improved stability for applications and services**: The update resolves several critical stability issues affecting various services and background processes which can cause them to unexpectedly stop working or crash.
2. **Enhanced security features**: This cumulative update includes enhancements to the Windows Defender Antivirus engine, improving its ability to detect and remove malware threats more effectively.
3. **Fixes for compatibility and performance**: It addresses several issues related to driver interactions, network connectivity, and application compatibility that can cause system slowdowns or prevent certain applications from functioning correctly.
This update also resolves the following specific issues:
– Fixes an issue where Windows Update could fail to install updates due to incorrect handling of update files.
– Resolves a problem with the Notepad app where it might crash when opening certain types of text files.
– Addresses an issue with the File Explorer sidebar, which in some cases did not display network locations correctly after waking from sleep mode.
Howto install KB4577021
To manually install KB4577021 on your Windows 10 system, follow these steps:
- Download and save the update file (KB4577021) to a location that is easily accessible.
- Open File Explorer, navigate to the folder where you saved KB4577021, and right-click on the downloaded .msu file.
- Select Install from the context menu. If an additional dialog appears asking for permission to run this software, click Run.
- Once installation begins, follow any prompts that appear during the process.
- The update may require you to restart your computer multiple times during and after the installation process.
- To ensure all changes are properly applied, allow Windows Update to finish installing updates automatically in the background if it detects additional required components. This can take several hours depending on your system configuration.
- After installation is complete, check for any newly installed drivers or applications that may require manual setup according to their documentation.
Similar questions
What does KB4577021 update fix or improve in my Windows operating system?
How can I check if the update KB4577021 has been installed on my computer?
Will installing KB4577021 affect my existing software applications and games?
Is there a risk of data loss when applying this update KB4577021 to my system?
Can I roll back or uninstall the update KB4577021 if it causes issues on my computer?
How much disk space is required for installing KB4577021 on Windows 10/11?
Does KB4577021 include any new security features or patches against malware and viruses?
Is there a specific order to install other updates with KB4577021, or can they be installed independently?
What are the system requirements for installing update KB4577021 on my Windows computer?
Does Microsoft provide detailed installation instructions for update KB4577021 somewhere online?