pnputil /add-driver "C:\path\to\driver.inf" /install
This usually happens on Windows 10 or 11 when trying to install unsigned or older drivers. Windows Security blocks them by default. how to install inf files
| Issue | Solution | |-------|----------| | "Access denied" | Run as Administrator | | INF not valid | Check file integrity / signing | | Missing companion files | Ensure all .sys , .dll files are in same folder | | Already installed | Use Device Manager to update driver | pnputil /add-driver "C:\path\to\driver