Windows 10 KB3178469 update fixes major lock screen vulnerability

By: Madeleine Dean
2 minute read

The latest Patch Tuesday updates fix a series of critical Windows 10 security vulnerabilities, making your system more secure. One of the most important cumulative updates for Windows 10 is KB3178469, which fixes a major lock screen vulnerability allowing attackers to execute code on a user’s locked computer.

This vulnerability could allow elevation of privilege when Windows improperly allows web content to load from the Windows lock screen. Hackers with physical access to a user’s computer could use two methods to exploit this vulnerability: they can either connect to a maliciously configured WiFi hotspot or insert a mobile broadband adaptor. Once the breach has been exploited, attackers can simply execute malicious code on a user’s locked computer.

However, the attacker would have no way to either force a user to connect to the hotspot or control the default browser selection on the user’s computer. The security update addresses the vulnerability by correcting the behavior of the Windows lock screen to prevent unintended web content from loading.

In other words, Windows 10 KB3178469 changes the behavior of the Windows lock screen to prevent hacker attacks.

To install Windows 10 KB3178469 you can go to the Windows Update Center and search for updates or you can download the stand-alone package from the Microsoft Update Catalog website. There are no workarounds available to fix this lock screen vulnerability, and you should install this Windows 10 cumulative update as soon as possible.

For more information about this cumulative update, you can check out Microsoft’s support page.

Cumulative Update KB3178469 is also available for Windows 8.1 and all the editions of Windows Server 2012.


For various PC problems, we recommend this tool.

This software will repair common computer errors, protect you from file loss, malware, hardware failure and optimize your PC for maximum performance. Fix PC issues now in 3 easy steps:

  1. Download this PC Repair Tool rated "Excellent" on
  2. Click “Start Scan” to find Windows issues that could be causing PC problems.
  3. Click “Repair All” to fix all issues with Patended Technologies (requires upgrade).

Next up

Best Windows 10 antivirus software to use in 2018

By: Radu Tyrsina
7 minute read

Update – 2018 will soon come to an end and we already have a guide on what is the best antivirus you should get in […]

Continue Reading

These features are out for good with Windows 10 version 1809' By: Sovan Mandal
2 minute read

Microsoft is all set to launch its next big update, Windows 10 version 1809 in October. While that should be a nice piece of news […]

Continue Reading

Windows 10 18H2 builds no longer receive new features

By: Matthew Adams
3 minute read

The Windows 10 October 2018 Update (otherwise 18H2) rollout might now be two to three weeks away. For the last few months, new build previews […]

Continue Reading