{"id":20455,"date":"2025-10-02T09:05:00","date_gmt":"2025-10-02T16:05:00","guid":{"rendered":"https:\/\/www.microsoft.com\/insidetrack\/blog\/?p=20455"},"modified":"2025-12-08T09:33:37","modified_gmt":"2025-12-08T17:33:37","slug":"transforming-security-and-compliance-at-microsoft-with-windows-hotpatch","status":"publish","type":"post","link":"https:\/\/www.microsoft.com\/insidetrack\/blog\/transforming-security-and-compliance-at-microsoft-with-windows-hotpatch\/","title":{"rendered":"Transforming security and compliance at Microsoft with Windows Hotpatch"},"content":{"rendered":"\n

Security updates are essential, and every security admin knows that when it comes to applying these updates, faster is better to mitigate the risk. However, security updates have always come with a catch: Windows needs to reboot to apply them.<\/p>\n\n\n\n

Reboots mean interrupted productivity and downtime for users.<\/p>\n\n\n\n

For us at Microsoft Digital, Microsoft\u2019s internal IT organization, Windows Hotpatch changes the equation.<\/p>\n\n\n\n

It\u2019s a new way to deliver critical Windows updates without rebooting. That means faster compliance, less downtime, and happier users.<\/p>\n\n\n\n

We\u2019re using it across Microsoft and it\u2019s already transforming how we think about security and productivity.<\/p>\n\n\n\n

\u201cHotpatch is helping Microsoft reach compliance faster than ever\u2014no reboots, no delays, secure systems at scale, and a seamless experience that keeps users more productive. The risk exposure window is reduced drastically, making our environment safer and more resilient,\u201d says Harshitha Digumarthi, a senior program manager within Microsoft Digital.<\/p>\n\n\n\n

Hotpatch installs updates while the system is running\u2014no reboot required. That means we can patch faster, stay compliant, and keep users happy.<\/p>\n\n\n\n

And it\u2019s not just us.<\/p>\n\n\n\n

Microsoft enterprise customers are already scaling deployments to millions of devices. We\u2019re seeing a shift in how organizations think about patching and how they can expedite the patch time. Hotpatch is here to help. It\u2019s no longer a disruption, it\u2019s just part of the flow. <\/p>\n\n\n\n

Increasing productivity and security with Hotpatch<\/h2>\n\n\n\n

Hotpatch is a servicing technology that delivers cumulative security updates\u2014released on Patch Tuesday, the second Tuesday of each month\u2014without requiring a system reboot. Instead of replacing binaries on disk and restarting the system, Hotpatch modifies in-memory code while the system is running.<\/p>\n\n\n\n

This means updates take effect immediately, with no downtime, no maintenance windows, and no disruption to users.<\/p>\n\n\n\n

Hotpatch payloads are small by design. Smaller updates mean faster downloads, quicker installs, and minimal impact on performance. CPU usage stays low. No spikes. No slowdowns. Just updates that run in the background and finish silently.<\/p>\n\n\n\n

\u201cThe experience is so seamless you don\u2019t even know what happened,\u201d says Nevine Geissa, a partner group program manager within the Windows product team. \u201cThere are no process restarts, no logging out, no performance impact. No glitch in the video playing or transaction dropping. Everything just works as if nothing has happened.\u201d<\/p>\n\n\n\n

Because hotpatch updates happen so painlessly in the background, IT administrators may want to understand how the process works and what validation steps are involved. That’s why we test hotpatch updates with the same rigorous standards we apply to all our security updates.<\/p>\n\n\n\n

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\u201cHotpatch updates go through the exact same validation and rigor that a standard security update goes through. There is no compromise on quality whatsoever. Your device is always as secure as your non-hotpatch device.\u201d<\/p>\nNevine Geissa, partner group program manager, Windows Servicing and Delivery<\/cite><\/blockquote>\n\n\n\n

Even in cases of zero-day vulnerabilities, Hotpatch can deliver out-of-band updates to enrolled devices without requiring a reboot.<\/p>\n\n\n\n

Hotpatch is available for Windows 11 version 24H2 or later, Windows 365, Azure Virtual Desktop, Windows Server 2022\/2025 Azure Edition, and Azure Arc connected Windows Server 2025 Datacenter and Standard editions.<\/p>\n\n\n\n

The technology has matured over years of internal development.<\/p>\n\n\n\n

\u201cHotpatch updates go through the exact same validation and rigor that a standard security update goes through,\u201d Geissa says. \u201cThere is no compromise on quality whatsoever. You will always be at the exact same level of security.\u201d<\/p>\n\n\n\n

Hotpatch has evolved and grown.<\/p>\n\n\n\n

\u201cIt started as internal server capability in Azure and then expanded to our Windows Server 2022 customers,\u201d says Nikita Deshpande, a senior customer experience program manager within the Windows Servicing and Delivery product team at Microsoft. \u201cThe tooling and OS support have matured such that now we can offer Hotpatch to AMD64 and Arm64 client machines now too.”<\/p>\n\n\n\n

Hotpatch integrates seamlessly with Autopatch, a cloud-based service from Microsoft that automates the process of keeping Windows devices up to date. Designed for enterprise environments, and powered by Microsoft Intune, Autopatch manages updates for Windows, Microsoft 365 Apps for enterprise, Microsoft Edge, and Microsoft Teams, reducing the manual effort required by IT administrators.<\/p>\n\n\n\n

Any new policy in our environment created with Autopatch automatically enables Hotpatch\u2014if the device meets requirements. Admins can set up rings, monitor compliance, and roll out updates with just a few clicks.<\/p>\n\n\n\n

\u201cIt\u2019s the better together story,\u201d Deshpande says. \u201cAutopatch streamlines everything. Add Hotpatch, and it takes Windows Update to a whole new level.\u201d<\/p>\n\n\n\n

Implementing Windows Hotpatch internally at Microsoft<\/h2>\n\n\n\n

The implementation of Hotpatch at Microsoft Digital involved developing and deploying a feature, as well as establishing trust for customers.<\/p>\n\n\n\n

The journey started years ago in Azure with virtual machines, then to Windows Server across physical and virtual instances. Now, it\u2019s on Windows 11 clients and scaling fast, but getting here took deep collaboration.<\/p>\n\n\n\n

Our team in Microsoft Digital partnered with the product team from the start. We were co-designers with experience in this space. We helped shape the rollout, validate the experience, and make sure Hotpatch was ready for enterprise scale.<\/p>\n\n\n\n

Then we scaled. We expanded to 40,000, then 80,000, then 120,000 devices. We\u2019re on track to reach 450,000 devices at Microsoft in the next four months.<\/p>\n\n\n\n

We also wanted a great admin experience enabled for the product. The features help with smooth rollout and the visibility helps admins monitor rollouts and measure impact. We’re continually collaborating with the Windows product team to equip administrators with comprehensive insights and actionable recommendations with Hotpatch.<\/p>\n\n\n\n

\u201cWe worked closely with the product team to make sure admins had the right metrics to measure the success,\u201d Digumarthi says. \u201cIt\u2019s not just about implementation\u2014it\u2019s about knowing it worked.\u201d<\/p>\n\n\n\n

We ran early adopter programs and insider rings to gather feedback from across Microsoft. That feedback loop helped refine the experience, improve reporting, and ensure the rollout was smooth.<\/p>\n\n\n\n

Achieving security without compromising on productivity<\/h2>\n\n\n\n

Hotpatching is changing how we think about security.<\/p>\n\n\n\n

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\u201cWith Hotpatch, we\u2019re seeing 81% of Microsoft\u2019s enrolled devices become compliant within 24 hours of Patch Tuesday and 90% of enrolled devices are patched within five days.\u201d<\/p>\nHarshitha Digumarthi, senior program manager, Microsoft Digital<\/cite><\/blockquote>\n\n\n\n

Before, it took our team up to nine months to reach 95% compliance for security patching.<\/p>\n\n\n\n

That\u2019s nine months of exposure and nine months of risk.<\/p>\n\n\n\n

With Hotpatch, we\u2019re achieving 95% compliance in less than three weeks<\/em>.<\/p>\n\n\n\n

\u201cWith Hotpatch, we\u2019re seeing 81% of Microsoft\u2019s enrolled devices become compliant within 24 hours of Patch Tuesday, and 90% of enrolled devices are compliant within five days,\u201d Digumarthi says.<\/p>\n\n\n\n

That\u2019s not just faster. It\u2019s safer.<\/p>\n\n\n\n

\u201cWe\u2019re reducing the risk window,\u201d Digumarthi says. \u201cFrom vulnerability discovery to patch deployment, we\u2019re closing the gap\u2014without disrupting users.\u201d<\/p>\n\n\n\n

And it\u2019s not just internal. Since general availability in April, Hotpatch has scaled to over 4.5 million devices globally. That growth shows trust and momentum.<\/p>\n\n\n\n

It also shows value. Admins spend less time chasing updates. End users stay productive. And security teams get the compliance they need\u2014without the friction.<\/p>\n\n\n\n

\u201cHotpatching eliminates the trade-off between security and productivity,\u201d Deshpande says. \u201cYou don\u2019t have to choose anymore.\u201d<\/p>\n\n\n\n

Improving the user experience<\/h2>\n\n\n\n

Hotpatching doesn\u2019t just improve security\u2014it transforms the user experience.<\/p>\n\n\n\n

For end users, it\u2019s invisible.<\/p>\n\n\n\n

Updates happen in the background.<\/p>\n\n\n\n

No pop-ups. No restarts. No performance hits.<\/p>\n\n\n\n

\u201cIt\u2019s so seamless,\u201d Geissa says. \u201cThere\u2019s no bubble. No prompt. It just works.\u201d<\/p>\n\n\n\n

Even the first few times, users might see a green banner letting them know they\u2019ve been hotpatched.<\/p>\n\n\n\n

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\u201cIt\u2019s really helpful as an end user; I feel more secure. I don\u2019t need to keep checking and making sure my device is up to date. It just is.\u201d<\/p>\nSenthil Selvaraj, principal group product manager, Microsoft Digital<\/cite><\/blockquote>\n\n\n\n

It\u2019s subtle. It\u2019s clean.<\/p>\n\n\n\n

It\u2019s so effective that it\u2019s become a kind of badge among Microsoft insiders.<\/p>\n\n\n\n

\u201cIt\u2019s really helpful as an end user\u2014I feel more secure,\u201d says Senthil Selvaraj, a principal group product manager at Microsoft Digital. \u201cI don\u2019t need to keep checking and making sure my device is up to date. It just is.\u201d<\/p>\n\n\n\n

That\u2019s the magic.<\/p>\n\n\n\n

Hotpatching doesn\u2019t interrupt work\u2014it protects it.<\/p>\n\n\n\n

It helps other systems stay current too. When the OS is secure, dependent apps and services can update more reliably. That ripple effect improves the overall health of the device.<\/p>\n\n\n\n

Admins also see the benefits. Intune reporting shows which devices are ready, which have updated, and which need attention. That visibility helps IT teams track compliance without chasing down machines or relying on manual checks.<\/p>\n\n\n\n

For enterprises, it means fewer help desk calls. Fewer complaints. Fewer delays.<\/p>\n\n\n\n

Looking forward<\/h2>\n\n\n\n

Hotpatching is just getting started.<\/p>\n\n\n\n

At Microsoft Digital, we\u2019re expanding from 100K to 450K devices in the next four months. That\u2019s nearly every eligible device in our fleet.<\/p>\n\n\n\n

Externally, adoption is accelerating. We\u2019ve gone from zero to almost 4.5 million devices since private preview in November 2024. That includes Microsoft and customer fleets, and the number keeps growing.<\/p>\n\n\n\n

But scale is just the beginning.<\/p>\n\n\n\n

The product team is exploring ways to improve compliance visibility\u2014giving admins deeper insights into patch status, readiness, and impact. That means better reporting, smarter dashboards, and tighter integration with compliance tools.<\/p>\n\n\n\n

We\u2019re also working to make adoption easier.<\/p>\n\n\n\n

Documentation is improving, Intune reporting is evolving, and we\u2019re building clearer guidance for customers to validate their environments, understand their risk posture, and deploy Hotpatch confidently.<\/p>\n\n\n\n

The vision is simple: secure every device, without disruption.<\/p>\n\n\n\n

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Key takeaways<\/p>\n<\/div>\n\n\n\n

Here are several key actions you can take to successfully implement Windows Hotpatch in your organization:<\/p>\n\n\n\n