| Problem | Solution | |---------|----------| | Driver installs but device shows code 10 | Disable driver signature enforcement: Restart → F8 → “Disable Driver Signature Enforcement” | | COM port changes every time | Use USB tree view in Device Manager → set fixed COM port via “Advanced” tab | | Prolific device not recognized after install | Roll back driver to v3.3.2.105 (newer versions block clones) | | Windows 7 64-bit error “driver not signed” | Run bcdedit /set testsigning on as admin → reboot |
However, is not a standard consumer product code. It may be: cx edu 100nzc drivers win7 30