Windows 11 Update KB5077181 Triggers Infinite Restart Loop on Some Devices
On February 10, 2026, Microsoft released the security update KB5077181 for Windows 11 versions 24H2 and 25H2. However, this update has led to significant issues for users, with many experiencing an infinite restart loop on their devices. Such failures have rendered desktops inaccessible, compounding frustrations for countless individuals.
Key Features of Update KB5077181
This cumulative update includes essential security patches that address numerous vulnerabilities. Specifically, it targets:
- 58 vulnerabilities across Windows components.
- Six actively exploited zero-day vulnerabilities.
Notable security flaws fixed in this update include:
| CVE ID | Description |
|---|---|
| CVE-2026-21510 | Bypass of security feature in Windows Shell, allowing SmartScreen evasion. |
| CVE-2026-21519 | Elevation of privilege in Desktop Window Manager to SYSTEM level. |
| CVE-2026-21533 | Elevation of privilege in Windows Remote Desktop Services; under active exploitation. |
| CVE-2026-20841 | Remote code execution vulnerability in Notepad via crafted Markdown files. |
Reported Issues Following Installation
Since its release, users have reported severe boot loop issues. Devices frequently restart, often more than 15 times, following the installation of this update. Common symptoms include:
- Login errors indicating SENS issues.
- Failure to establish internet connections due to DHCP errors.
Error messages such as 0x800f0983 and 0x800f0991 have also emerged, particularly affecting certain hardware configurations. Users have shared their experiences on platforms like Reddit and Microsoft Answers, documenting various cases.
Suggested Workarounds
For those affected by these restart loops, immediate uninstallation of KB5077181 is highly recommended. Here’s how:
- From a functioning desktop, navigate to Control Panel > Programs and Features.
- Select “View installed updates” and locate KB5077181 to uninstall it.
- Restart your device afterward and pause Windows Update to prevent reinstallation.
If boot loops persist, enter the Windows Recovery Environment by interrupting the boot process three times or using installation media. Then, follow these steps:
- Select Troubleshoot > Advanced options > Command Prompt.
- Execute the command:
wusa /uninstall /kb:5077181 /quiet /norestart. - Run
sfc /scannowfor potential file repairs.
Enterprise Recommendations and Final Thoughts
Businesses should approach this update with caution. It is advisable to deploy KB5077181 via WSUS, ensuring adequate testing and monitoring before widespread application. Although some users have reported improvements in stability and performance post-update, the potential for instability remains a notable concern.
As of February 15, Microsoft has not publicly acknowledged these issues, so users are advised to proceed carefully, especially on non-essential systems. For ongoing updates about cybersecurity, follow Filmogaz.com on Google News, LinkedIn, and X.
