Windows Driver Testing Services
Whatever Windows driver certification you strive to achieve, Apriorit’s in-house experts are ready to make it happen.
Our engineers check new, updated, and legacy products to identify the root causes of failed test runs. Let us prepare full HLK infrastructure, eliminate driver inefficiencies, and provide submission packages for the certifications you require.
Reliability and Certification Readiness for Your Drivers
Receive a full spectrum of Windows driver testing services. Apriorit’s experts both test and fix drivers thanks to specialized QA skills, system-level development expertise, and fully prepared testing infrastructure.
Instead of coordinating multiple vendors, you’ll work with one team that’s capable of handling driver validation and low-level engineering challenges.
250+
Driver projects delivered
20+
Years of experience
98%
Client retention rate
50+
Driver development experts
Partner with Apriorit for Windows driver testing to:
- Get driver testing, remediation, and certification support from a single engineering team
- Have a ready-to-use testing environment configured for your certification scope
- Identify and eliminate the root causes of failed HLK tests
- Receive validated test results and a fully prepared submission package
- Modernize legacy drivers to meet current Windows requirements
- Maintain certification readiness after future releases
Apriorit’s Driver Testing Services for WHQL and Other Certifications
WHQL readiness assessment for new drivers
Define a clear path to Windows hardware certification before formal testing begins.
We’ll run tests to determine the applicable HLK scope, identify potential certification blockers, and make sure everything is ready for successful certification.
Failed HLK test troubleshooting
Understand why your driver failed thanks to an extensive test report with clear explanations and suggestions for nextsteps.
To identify the root cause of each failure, Apriorit’s specialists analyze:
- HLK logs, crash dumps, and INF files
- Installation behavior
- Driver code and system events
- Hardware behavior
- Laboratory configurations
Multi-configuration HLK testing
Validate your driver across required Windows versions, system architectures, devices, and physical or virtual hardware configurations.
We’ll build and execute a structured test matrix to verify each target environment separately and reveal configuration-specific issues before driver submission.
Driver remediation and retesting
Resolve the issues preventing your driver from passing certification tests.
Upon your request, Apriorit engineers will fix defects involving stability, compatibility, security, installation, performance, behavior, and resource handling.
Then, we’ll rerun failed tests and validate the updated driver.
Legacy driver modernization and certification preparation
Modernize an outdated driver in line with current Windows and HLK requirements. Let Apriorit professionals:
- Update installation packages
- Replace deprecated APIs
- Improve system behavior to meet current Windows and HLK requirements
- Address security and compatibility issues
- Fully prepare the modernized driver for certification testing
Submission package preparation and full support
Submit your driver package with confidence. Apriorit provides guidance throughout the submission process and helps you address technical questions or requests from Microsoft.
You’ll receive:
- Validated HLK results
- A submission-ready .hlkx package
- Supporting technical documentation
- Full Partner Center guidance
Recertification and ongoing support
Maintain certification readiness as your product evolves.
When driver binaries, installation packages, supported Windows versions, architectures, or hardware configurations change, Apriorit experts:
- Assess the impact
- Rerun the necessary test scope
- Prepare updated submission materials
Windows Drivers We Test and Prepare for Certification
Get your driver ready for Windows certification
Reach out to uncover certification blockers early and prepare a submission-ready driver in time with your project deadlines.
Apriorit’s Tech Stack for Professional Driver Development and Testing
C++
C
Assembly
Rust
Windows Hardware Lab Kit (HLK)
HLK Controller
HLK Studio
HLK Client
Virtual HLK (VHLK)
Windows Hardware Compatibility playlists
Windows HLK filters
Windows HLK supplemental test content
Windows Driver Kit
Windows Driver Frameworks
Kernel-Mode Driver Framework
User-Mode Driver Framework
Windows Image Acquisition
Windows Driver Model
Microsoft Visual Studio
WinDbg
Driver Verifier
DTrace
Windows file system minifilters
Windows network mini-redirector drivers
Network Driver Interface Specification
Windows Filtering Platform
Winsock Kernel
Virtualization and virtual device drivers
Windows Image Acquisition
Additional Engineering Expertise for Complex Driver Projects
Why choose Apriorit for WHQL driver testing?
01
Immediate access to an HLK testing environment
No need to build and maintain your own HLK lab. Apriorit engineers prepare the required infrastructure for your certification scope so your team can focus on product development. We take care of controllers, test machines, target devices, operating systems, software, filters, and supporting test content.
02
Driver development, testing, and remediation under one roof
Unlike testing-only providers, Apriorit’s QA specialists work alongside experienced developers. This helps us quickly identify certification failures, accurately investigate root causes, reliably fix driver issues, and validate results through retesting.
03
Rare low-level engineering expertise
Work with specialists experienced in kernel development, OS internals, system programming, virtualization, hardware integration, debugging, and low-level software architecture. This expertise helps us tackle issues that extend far beyond basic test execution.
04
Fast project start in under 2 weeks
Assemble the right team quickly and begin addressing certification challenges without lengthy onboarding cycles. This is possible thanks to Apriorit’s mature delivery processes, established legal documentation, and in-house-only engineers.
Our Recent Windows Driver Projects
Improving a Windows Audio Driver to Obtain a WHQL Release Signature
When a British audio technology company needed to certify the Windows driver behind its AI-powered product, Apriorit helped investigate driver issues, conduct pre-release debugging, and successfully complete WHQL testing requirements.
IRIS has been satisfied with the quality of services provided by Apriorit experts and continues cooperating with us. Our experts are supporting and maintaining the Windows version of the app, improving its security and performance.
Developing Drivers for Low-Latency Virtual Reality Headsets
A VR device manufacturer needed reliable Windows drivers before launching a new device. Apriorit designed the required drivers and communication protocol, helping prepare the product for WHQL certification and commercial release.
The drivers are WHQL certified and help the device operate with 3–10 ms of latency and ~11 Gbps data transmission speed. The client successfully released their product and received positive feedback on it.
WHQL Testing and Certification by Microsoft: Step-by-Step Process for Your Driver
Apriorit shares a practical roadmap for Microsoft Hardware Certification based on our real-life driver testing experience. Discover how our QA specialists deploy WHQL infrastructure, analyze failures, and help teams achieve stable, Windows-compatible releases.
To conduct testing that satisfies Microsoft, you need to work with specific toolkits and design a test flow according to all of Microsoft’s requirements. Our team supports you during all certification stages.
Windows Hardware Lab Kit (HLK) Driver Testing for WHQL Certification: Timeline and Factors Affecting It
See how Apriorit approaches HLK testing in real-world environments, from lab preparation and validation to debugging and certification support. Gain practical guidance to improve predictability and shorten release cycles.
Defining how the driver will be deployed in production — including update scenarios and supported Windows versions — helps avoid unnecessary test re-runs and keeps the certification process predictable.
Turn Windows driver certification into a predictable process
Collaborate with Apriorit’s dedicated team of driver engineers and QA specialists to accelerate your product testing, remediation, and certification preparation.
What our clients
say about us
How We Work: WHQL Testing Flow
01
Create a machine pool
We’ll configure and organize test machines to validate your driver across required certification environments.
02
Create a test project
Our experts will define the certification scope by creating a project that contains the target driver, testing requirements, and validation objectives.
03
Select and run tests
Apriorit’s experts will execute applicable HLK test suites to validate your driver’s functionality, reliability, and Windows compatibility.
04
Analyze the results
After reviewing test logs, we provide a detailed report that outlines certification blockers, explains investigated failures, and recommends next steps for their remediation.
FAQ
What are WHQL and HLK testing?
<p><b>Windows Hardware Quality Labs (WHQL) testing</b> is the process of testing a Windows driver against Microsoft’s requirements as part of the Windows hardware certification process.</p>
<b>Hardware Lab Kit (HKL) testing</b> involves running Microsoft’s prescribed Windows hardware/driver tests using the Hardware Lab Kit, which is Microsoft’s testing framework.
Can Apriorit submit a driver to Microsoft on our behalf?
<p>No, since the final submission must be made through the driver owner’s registered Microsoft Hardware Developer Program account.</p>
<p>However, Apriorit engineers can prepare the complete submission package, provide instructions, support your team during submission, and help you respond to technical questions or requests from Microsoft.</p>
We perform HLK testing and prepare submissions for certification under Microsoft’s WHCP, resulting in WHQL signing.
Can you fix a driver that has already failed HLK tests?
Yes. Our QA specialists and driver engineers will gladly help you analyze failures and fix the driver accordingly. For example, to identify the root cause of failure, we analyze test logs, crash dumps, INF files, installation behavior, system events, and more.
Can you test a driver developed by our team or another vendor?
<p>Yes. Apriorit’s team tests and remediates existing drivers regardless of who originally developed them.</p>
<p>To fix source-level issues, we usually need access to:</p>
<ul class=apriorit-list-markers>
<li>Source code</li>
<li>Build instructions</li>
<li>Driver packages</li>
<li>Relevant hardware</li>
<li>Technical documentation</li>
<li>Existing logs and reports</li>
</ul>
How long does WHQL testing take?
<p>For a driver that is already stable and prepared for certification, HLK testing itself can typically be completed within several days. However, projects that require failure investigation, driver remediation, retesting, or support for multiple Windows versions may take longer.</p>
The duration of WHQL testing depends on the driver type, certification scope, target Windows versions, hardware requirements, and the number of environments that must be validated.
How much does it cost to conduct WHQL driver testing?
<p>The cost of WHQL testing depends on the certification scope, target Windows environments, and any remediation work required to address failed tests. After reviewing your driver, hardware, and certification goals, Apriorit can provide a tailored estimate for testing, remediation, and certification support.</p>
Do I need to provide the physical device?
<p>In many cases, yes. WHQL and HLK testing often require access to the physical hardware associated with the driver being certified.</p>
However, exact requirements depend on the driver type, certification scope, and applicable HLK tests. During project assessment, Apriorit’s specialists determine whether physical hardware, remote access, existing laboratory equipment, or a virtualized test environment can be used.
Can Apriorit test legacy drivers?
<p>Yes. Apriorit can test, modernize, and prepare legacy Windows drivers for current HLK and WHQL certification requirements.</p>
<p>Depending on the driver’s age and condition, certification preparation may involve updating INF or DCH packages, replacing deprecated APIs, improving Plug and Play and power management behavior, addressing compatibility or security issues, and implementing support for modern Windows requirements such as HVCI.</p>
After a technical assessment, our engineers can determine the modernization effort required and develop a plan for achieving certification readiness.
Do I need to rerun HLK tests after updating the driver?
<p>It depends on what has changed. Modifications to the driver, installation package, supported platforms, or hardware configurations may require additional HLK testing and a new certification submission.</p>
After reviewing the changes, Apriorit can determine whether targeted retesting is enough or a broader validation effort is required.
Tech insights
and expert tips
-
Extending Laboratory Middleware to Legacy Analyzers with a Custom Driver
See how Apriorit extended laboratory middleware support for legacy lab instruments with protocol reverse engineering and driver development.
-
How to Debug the Linux Kernel with QEMU and Libvirt
A hands-on guide to Linux kernel debugging with QEMU, Libvirt, and GDB. Explore step-by-step instructions for debugging kernel images and modules.
-
We Vibe Coded a Windows Driver, and Here’s What We Learned about AI in Driver Development
We built a Windows driver entirely with AI to see what breaks. Learn where AI helps in driver development, where it fails, and how to use it safely.
-
How Much Does Driver Development Cost? Factors and Budget Tips
What affects device driver development cost? Learn key pricing factors, engagement models, and budget tips from Apriorit’s driver development expert…
