Incident: Windows 10 Patch KB4524244 Causes System Freeze and Malfunction

Published Date: 2020-02-17

Postmortem Analysis
Timeline 1. The software failure incident with the KB4524244 security patch happened on February 11, 2020 as reported in Article 95650.
System 1. Windows 10 patch KB4524244 [95650]
Responsible Organization 1. Microsoft [95650]
Impacted Organization 1. Users who installed the KB4524244 security patch for Windows 10 experienced freezing, update failures, malfunctioning when resetting the system, and issues with booting up the operating system [95650].
Software Causes 1. The software causes of the failure incident were related to the problematic Windows 10 security update KB4524244, which was designed to address a security vulnerability in third-party Unified Extensible Firmware Interface (UEFI) boot managers. However, the update led to various issues such as installation failures, PC freezes, booting problems, and malfunctioning of the 'Reset This PC' feature [95650].
Non-software Causes 1. The KB4524244 security patch was designed to address an issue with a third-party Unified Extensible Firmware Interface (UEFI) boot manager, which might expose UEFI-enabled computers to a security vulnerability [95650].
Impacts 1. Computers froze, failed to update, and malfunctioned when resetting the system after installing the KB4524244 security patch [95650]. 2. The update caused issues when trying to boot up the operating system and in some cases broke Windows 10's 'Reset This PC' feature [95650]. 3. Users might restart into recovery with “Choose an option” at the top of the screen with various options or receive the error “There was a problem resetting your PC” after installing the patch [95650]. 4. Some users lost access to their user profile, apps, data, and start menu configurations due to a previous faulty patch, KB4532693 [95650].
Preventions 1. Thorough testing before release: Conducting comprehensive testing, including compatibility testing with various hardware configurations and scenarios, could have potentially identified the issues with the KB4524244 security patch before its release [95650]. 2. User feedback and beta testing: Involving a group of users in beta testing programs to gather feedback on the update's performance in real-world environments could have helped in identifying and addressing potential issues before a widespread release [95650]. 3. Improved communication and transparency: Providing clear and detailed information about the update, its purpose, potential impacts, and troubleshooting steps could have helped users make informed decisions about installing the patch and mitigating any issues that arise [95650].
Fixes 1. Uninstall the KB4524244 security patch by selecting it in the Installed Updates dialog window and clicking the Uninstall button, then restart the device [95650].
References 1. Microsoft spokesperson [95650]

Software Taxonomy of Faults

Category Option Rationale
Recurring one_organization (a) The software failure incident having happened again at one_organization: The article mentions a previous faulty patch, KB4532693, which caused users to lose access to their user profile, apps, data, and start menu configurations. This indicates that Microsoft has faced similar software failure incidents with its Windows 10 patches in the past [95650]. (b) The software failure incident having happened again at multiple_organization: There is no information in the provided article about the software failure incident happening at other organizations or with their products and services.
Phase (Design/Operation) design, operation (a) The software failure incident related to the design phase is evident in the article. The problematic Windows 10 patch, KB4524244, was intended to address a security vulnerability related to a third-party Unified Extensible Firmware Interface (UEFI) boot manager. However, after installation, users experienced issues such as computers freezing, failing to update, malfunctioning during system resets, and breaking the 'Reset This PC' feature. These issues indicate that the update introduced new problems rather than solving the intended security issue, highlighting a failure in the design phase [95650]. (b) The software failure incident related to the operation phase is also apparent in the article. Users who installed the KB4524244 security patch encountered various issues such as PCs freezing, update failures, and difficulties booting up the operating system. These operational failures caused inconvenience and disruptions to users, showcasing problems introduced during the operation or use of the system [95650].
Boundary (Internal/External) within_system (a) within_system: The software failure incident related to the KB4524244 security patch for Windows 10 was caused by issues within the system itself. Users reported that the update either failed to install, caused PCs to freeze, or caused problems when trying to boot up the operating system. Additionally, the patch broke the 'Reset This PC' feature, which is a function within the Windows 10 operating system. Microsoft acknowledged the problems and had to pull the security patch from distribution channels to address the issues [95650].
Nature (Human/Non-human) non-human_actions (a) The software failure incident in Article 95650 occurred due to non-human actions. The failure was related to a troublesome Windows 10 patch named KB4524244, which caused computers to freeze, fail to update, malfunction when resetting the system, and break the 'Reset This PC' feature. This issue was not caused by human actions but rather by the faulty design or implementation of the security patch by Microsoft [95650].
Dimension (Hardware/Software) hardware, software (a) The software failure incident occurring due to hardware: - The software failure incident related to the KB4524244 security patch for Windows 10 was caused by an issue in which a third-party Unified Extensible Firmware Interface (UEFI) boot manager might expose UEFI-enabled computers to a security vulnerability [95650]. (b) The software failure incident occurring due to software: - The software failure incident related to the KB4524244 security patch for Windows 10 was caused by the update either failing to install, causing PCs to freeze, or causing issues when trying to boot up the operating system [95650].
Objective (Malicious/Non-malicious) non-malicious (a) The software failure incident related to the Windows 10 patch KB4524244 was non-malicious. The update was designed to address a security vulnerability related to a third-party Unified Extensible Firmware Interface (UEFI) boot manager. However, users reported issues such as failed installations, freezing PCs, and problems with booting up the operating system after installing the patch. Microsoft acknowledged the problems and pulled the update to work on a revised version [95650].
Intent (Poor/Accidental Decisions) poor_decisions (a) The software failure incident related to the Windows 10 patch KB4524244 can be attributed to poor_decisions. Microsoft released the security update to address a security vulnerability in third-party UEFI boot managers. However, the update ended up causing various issues such as computers freezing, failing to update, malfunctioning during system resets, and breaking the 'Reset This PC' feature. This indicates that the decision to release the patch without thorough testing or consideration of potential side effects led to the software failure incident [95650].
Capability (Incompetence/Accidental) development_incompetence, accidental (a) The software failure incident related to development incompetence is evident in the article as Microsoft released a troublesome Windows 10 patch, KB4524244, which caused computers to freeze, fail to update, malfunction when resetting the system, and even break the 'Reset This PC' feature. This indicates a lack of professional competence in the development and testing of the update [Article 95650]. (b) The accidental software failure incident is also present in the article as the KB4524244 security patch, which was intended to address a security vulnerability, ended up causing various issues for users, such as failed installations, PC freezes, and boot-up problems. These unintended consequences point to accidental failures introduced during the development and deployment of the update [Article 95650].
Duration temporary (a) The software failure incident related to the Windows 10 patch KB4524244 can be considered temporary. Microsoft was forced to pull the troublesome patch after users reported issues such as computers freezing, failing to update, malfunctioning when resetting the system, and breaking the 'Reset This PC' feature. The company is working on a revised version of the update, indicating that the failure was due to contributing factors introduced by certain circumstances but not all [95650].
Behaviour crash, omission, value, other (a) crash: The software failure incident mentioned in the article resulted in computers freezing, failing to update, and malfunctioning when resetting the system after installing the KB4524244 security patch for Windows 10 [95650]. (b) omission: The KB4524244 security patch caused issues such as failing to install, causing PCs to freeze, and breaking the 'Reset This PC' feature, which is supposed to re-install the operating system while retaining personal files [95650]. (c) timing: There is no specific mention of the software failure incident being related to timing issues in the article. (d) value: The software failure incident caused the system to perform its intended functions incorrectly, leading to various issues like freezing, update failures, and malfunctioning during system resets [95650]. (e) byzantine: The article does not mention the software failure incident exhibiting inconsistent responses or interactions. (f) other: The software failure incident also led to users losing access to their user profiles, apps, data, and start menu configurations, in addition to the freezing and update issues caused by the KB4524244 security patch [95650].

IoT System Layer

Layer Option Rationale
Perception None None
Communication None None
Application None None

Other Details

Category Option Rationale
Consequence property The consequence of the software failure incident described in the articles is as follows: (d) property: People's material goods, money, or data was impacted due to the software failure - The software failure incident related to the troublesome Windows 10 patch (KB4524244) caused computers to freeze, fail to update, malfunction when resetting the system, and even break the 'Reset This PC' feature. Users reported issues such as failed installations, PC freezes, and errors when trying to boot up the operating system after installing the patch. Microsoft had to pull the security patch from Windows Update, Windows Server Update Services, and the Microsoft Update Catalogue, indicating a significant impact on users' devices and data security [Article 95650].
Domain information (a) The failed system was related to the information industry as it involved a Windows 10 security patch (KB4524244) released by Microsoft [95650].

Sources

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