Microsoft releases critical Windows 10 security update – which doesn’t work

Another fail – and this time it’s serious

When you purchase through links on our site, we may earn an affiliate commission.Here’s how it works.

A severe security bugwas recently discovered in Windows 10, and althoughMicrosoftwas quick to issue a patch to fix it, it appears that it is failing to install for some users.

Numerous users have taken toReddit(and also Microsoft’s community forum), to complain that update KB4528760, which is supposed to patch PCs with theWindows 10 May 2019 UpdateandWindows 10 November 2019 Updateinstalled, is failing to install, and instead displaying unhelpful error messages.

While the number of users reporting the problem so far seems relatively low, it’s still cause for concern, as the severity of the threat is bad enough that the US National Security Agency (NSA) issued a warning that stated that anyone runningWindows 10, Windows Server 2016 or Windows Server 2019 is “strongly encouraged” to install the patch, while also contacting Microsoft directly to help with a fix.

If users can’t install the patch, then that leaves them potentially vulnerable.

Nasty bug

Nasty bug

The security bug discovered by the NSA affects Windows CryptoAPI (Crypt32.dll), and could enable an attacker to use fake security certificates to install malware under the guise of being valid software. Experts warn the vulnerability could also be exploited to attack networks.

So, it’s pretty important to install the patch that fixes it – and it’s worrying that some people apparently cannot do that.

This is the latest ina long line of problematic Windows 10 updatesissued by Microsoft, with previous updates introducing new issues and bugs, and it suggests there is something going on behind the scenes.

Get the best Black Friday deals direct to your inbox, plus news, reviews, and more.

Get the best Black Friday deals direct to your inbox, plus news, reviews, and more.

Sign up to be the first to know about unmissable Black Friday deals on top tech, plus get all your favorite TechRadar content.

While previous issues with Windows 10 updates have been annoying, this new problem is particularly concerning as it could be putting people’s security and privacy at risk.

According to Windows Latest, which has reported these problems, you can at least get around this issue by installing the update manually.

To do this,go to the Microsoft Update Catalogwebsite, and in the search bar, enter in “KB4528760”, then click ‘Download’ next to the version that’s suitable for your PC.

Hopefully Microsoft will also fix any issues with the automatic installation of this important security patch as soon as possible.

Matt is TechRadar’s Managing Editor for Core Tech, looking after computing and mobile technology. Having written for a number of publications such as PC Plus, PC Format, T3 and Linux Format, there’s no aspect of technology that Matt isn’t passionate about, especially computing and PC gaming. He’s personally reviewed and used most of the laptops in our best laptops guide - and since joining TechRadar in 2014, he’s reviewed over 250 laptops and computing accessories personally.

Windows 11’s Paint and Notepad apps are getting smart new AI features – though one of the best will be for Copilot+ PCs only

Windows 11 24H2 misery continues, as Microsoft’s buggy update is now breaking printers – especially on Copilot+ PCs

Another reason to avoid edge-lit 4K TVs: they may fail faster than others, according to this report