[MyAddReg] HKR,, DeviceType,, 0x00000001
Save this as mydriver.inf , place your MyDriver.sys in the same folder, right-click install, and Windows will now recognize your custom USB device (assuming you wrote the .sys file to handle the actual communication). With the rise of Windows Driver Frameworks (WDF) and Universal Windows Drivers (UWD) , the complexity of INF files has actually decreased. Microsoft is pushing towards DCHU (Declarative, Componentized, Hardware Support Apps, Universal) drivers, where the INF file does less work, and more logic moves to user-space apps or firmware. inf drivers
[DeviceList.NTamd64] %DeviceDesc% = InstallSection, PCI\VEN_8086&DEV_100E [DeviceList
However, INF files are not going away. They are deeply baked into the PnP manager. Even the new methods for driver installation (like Add-WindowsDriver ) ultimately rely on parsing INF syntax. As long as Windows needs to map a hardware ID to a binary file, the humble INF will be there. Conclusion: Respect the text file Next time you fix a "Code 28" error (The drivers for this device are not installed) or manually point Device Manager to a folder of driver files, take a moment to look at the .inf file inside. It is just text. It has no flashing UI, no complex algorithms. It is a list of instructions written in a dialect invented when Windows 95 was state-of-the-art. As long as Windows needs to map a
Fast forward to 2025 (and beyond), and INF files are still the backbone of driver installation. Whether you install a driver via Windows Update, a vendor’s .exe installer, or manually via Device Manager, an INF file is almost certainly being parsed in the background. Let’s look at a very simplified version of what an INF file looks like. Open any .inf file in Notepad, and you will see sections denoted by square brackets.
If you have ever plugged a mouse, a printer, or a custom piece of industrial equipment into a Windows PC, you have relied on an INF file. Despite being one of the most fundamental components of the Windows operating system for over three decades, the "INF driver" remains a mystery to most users—and even to some developers.