: After extracting the files, locate the driver. Typically, drivers have a .sys , .dll , or .inf extension. The .inf file is crucial as it contains installation information.

| Issue | Likely Cause | Solution | |-------|--------------|----------| | "The driver package does not contain an INF file" | Corrupt CAB or wrong file | Extract first, verify INF presence | | "A service installation section in this INF is invalid" | Syntax error or missing service definition | Use infverif tool from Windows SDK | | "Third-party INF does not contain digital signature" | Unsigned driver on 64-bit | Enable test signing or obtain signed version | | "PnPUtil cannot install driver because no matching device found" | Hardware ID mismatch | Check INF for correct HardwareIDs | | Error 0x800b0100 (TRUST_E_SUBJECT_NOT_TRUSTED) | Invalid signature or expired cert | Redownload from official source |

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