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.
When you plug in a USB device, Windows searches the Driver Store for an INF file that matches the device’s hardware ID. If it finds one, it stages the driver to the runtime directory. This is why Windows can reinstall a driver automatically even if you delete the original folder you downloaded. Despite being ancient technology, INF drivers cause modern headaches. Here are the three most common issues users face: 1. The "The INF file you selected does not support this method of installation" Error You right-click the INF and click Install, and Windows rejects it. This usually happens because the INF is not designed for manual installation. It lacks a DefaultInstall section. Many modern drivers require installation via Device Manager (Update Driver -> Browse my computer -> Let me pick). 2. The "Digital Signature" Problem (Error 52) Starting with Windows 10 (and enforced heavily in Windows 11), Microsoft requires all kernel-mode drivers to be digitally signed by a trusted authority. If you download an old or custom INF driver, Windows will refuse to load it. You can disable signature enforcement temporarily (for testing), but for daily use, you need a properly signed driver. 3. The "Service installation section" missing If you see The specified service does not exist as an installed service , your INF file likely omitted the AddService directive. Windows needs to know that this driver runs as a system service. Writing your own INF driver: A weekend project You might need to write an INF file for a custom USB device (like an Arduino with a custom PID/VID) or a legacy piece of industrial hardware. Here is a minimal template to get started: inf drivers
[SourceDisksFiles] MyDriver.sys = 1
[MyCopyFiles] MyDriver.sys
[MyInstall] CopyFiles=MyCopyFiles AddReg=MyAddReg Save this as mydriver
[InstallSection] CopyFiles = DriverCopyFiles AddReg = DriverAddReg When you plug in a USB device, Windows