Even after downloading from a "official" site, you should verify the driver:
A verified driver means:
Without a verified driver, you risk:
| Issue | Solution |
|-------|----------|
| Device shows as "Unknown" | Force install driver from ASIX INF file via "Have Disk" |
| No internet after install | Disable IPv6 or reset TCP/IP: netsh int ip reset |
| macOS shows "Extension blocked" | Go to System Settings → Privacy & Security → Allow network extension |
| Works only at USB 2.0 speeds | Use a USB 3.0 or USB-C port (blue port) | ky888 usb ethernet driver verified