Users with older hardware may soon find themselves facing compatibility issues with Windows, as Microsoft prepares to enforce a new security policy designed to bolster the integrity of drivers. The change, centered around a new kernel trust policy, aims to eliminate reliance on drivers signed with a program that Microsoft discontinued in 2021. Even as the rollout will be phased, and Microsoft is initially taking a monitoring approach, the long-term effect could render some legacy devices unusable with future versions of the operating system. This shift in Windows security is a critical update for users, and understanding the implications is becoming increasingly important.
The core of the issue lies with drivers signed by a program that Microsoft has since deprecated. These “cross-signed” drivers, while currently still “broadly trusted” by Windows, rely on certificates that have now expired. Microsoft is moving to a system where only drivers signed with current, valid certificates will be fully trusted by the operating system. This is a proactive step to prevent malicious code from being introduced through compromised or outdated drivers, a common entry point for cyberattacks. The move impacts Windows 11 versions 24H2, 25H2, 26H1, and Windows Server 2025, with all future releases expected to enforce the new policy, according to a post by Peter Waxman, a group program manager at Microsoft, on the Windows IT Pro Blog. He emphasized that “drivers are a critical part of the Windows ecosystem, and ensuring their integrity is essential to providing a secure and trustworthy environment.”
How the New Policy Will Roll Out
Microsoft isn’t immediately blocking all older drivers. Instead, the company is implementing an “evaluation mode” to assess the potential impact of the change. During this phase, which will begin with the release of Windows 11 24H2, the system will monitor and audit driver loads. The evaluation period requires systems to meet specific criteria: 100 hours of runtime and two to three successful restarts. If all drivers loaded during this period are trusted – meaning they have valid signatures – the new policy will activate. Though, if any cross-signed drivers are detected, the system will remain in evaluation mode until those drivers are no longer loaded.
This evaluation period is designed to give users and hardware manufacturers time to update drivers. It also allows Microsoft to gather data on potential compatibility issues before fully enforcing the policy. The company acknowledges that some older hardware may not have updated drivers available, and the evaluation mode is intended to minimize disruption. However, the clock is ticking for manufacturers and users of older systems to ensure compatibility.
What Types of Hardware Are Affected?
Determining exactly which hardware will be affected is complex. The impact will vary depending on the age of the hardware and whether the manufacturer continues to provide driver updates. Generally, older peripherals – printers, scanners, specialized industrial equipment, and older graphics cards – are more likely to rely on cross-signed drivers. Devices that haven’t been updated in several years are at the highest risk. Newer hardware, particularly from major manufacturers, is likely to already be using drivers signed with current certificates.
The issue isn’t limited to desktop computers. Servers, particularly those running older hardware configurations, are also potentially affected. Businesses relying on legacy server infrastructure will necessitate to carefully assess their driver situation and plan for updates or replacements. The potential for widespread disruption is significant, particularly in industries that rely on specialized hardware with limited update support.
The Importance of Driver Security
The move to enforce stricter driver signing requirements reflects a growing concern about the security of the Windows ecosystem. Drivers operate at a very low level within the operating system, giving them significant access to system resources. A compromised driver can be used to install malware, steal data, or even take complete control of a computer.
Historically, drivers have been a frequent target for attackers. The complexity of driver development and the lack of consistent security practices have made them a vulnerable point in the system. By requiring all drivers to be signed with valid certificates, Microsoft aims to reduce the risk of malicious drivers being installed and executed. This is part of a broader trend towards “kernel-level security,” where the core of the operating system is hardened against attacks.
What Users Can Do Now
For individual users, the first step is to check for Windows Updates. Microsoft is expected to provide tools and information to assist users identify potentially problematic drivers. Device Manager, a built-in Windows utility, can be used to view information about installed drivers, including their signing status. Users should also check the websites of their hardware manufacturers for updated drivers.
Businesses should take a more proactive approach, conducting a comprehensive inventory of their hardware and software. They should identify systems that are running older drivers and develop a plan for updating or replacing them. This may involve working with hardware vendors to obtain updated drivers or considering hardware upgrades. The cost of inaction could be significant, potentially leading to system outages and security breaches.
Microsoft provides resources on its website dedicated to driver security and the new kernel trust policy. The official blog post details the changes and provides guidance for IT professionals. Staying informed about these updates is crucial for ensuring a smooth transition.
The enforcement of this new Windows security policy represents a significant step towards a more secure computing environment. While it may cause temporary inconvenience for some users with older hardware, the long-term benefits of improved security outweigh the costs. The next major milestone will be the release of Windows 11 24H2, which will initiate the evaluation phase and begin the process of phasing out support for cross-signed drivers.
Have thoughts on this upcoming change? Share your experiences and concerns in the comments below. And please, share this article with anyone who might be affected by this important Windows security update.
