Once you have the 2021 driver package (.inf, .sys, and possibly .exe), follow this installation method that worked perfectly in 2021 and continues to work today.
Because many CB31005 drivers in 2021 were not Microsoft WHQL-certified:
Even with the correct driver, Windows 10/11’s driver signature enforcement often blocks 2021 installs. Follow this sequence:
Step 1: Disable Driver Signature Enforcement (Temporary) cb31005 driver download 2021
Step 2: Run the Installer as Administrator
Step 3: Manual Driver Update via Device Manager
Step 4: Verify COM Port Assignment
You might be hunting for the 2021 driver specifically because:
Since 2021 has passed, official links may be dead. Use the following methods to obtain the CB31005 driver from 2021.
Even with the correct CB31005 driver download 2021, problems can arise. Here are the fixes. Once you have the 2021 driver package (
| Problem | 2021-Era Solution | | :--- | :--- | | Code 52: Driver not signed | Disable driver signature enforcement (see Step 1 above). | | Screen flickering at 1080p | Lower resolution to 1366x768 or 1280x720. 2021 drivers had a known bug with 60Hz at 1080p on USB 2.0 ports. | | Device shows as "Unknown USB Device (Device Descriptor Request Failed) | Your USB port is not providing enough power. Use a powered USB hub. 2021 drivers could not recover from under-voltage. | | Blue screen (BSOD) on sleep/resume | Go to Device Manager > Right-click CB31005 > Properties > Power Management > Uncheck "Allow the computer to turn off this device to save power." | | No video output on Windows 11 | Windows 11 (build 22000) in 2021 blocked many USB graphics drivers. You must use compatibility mode: Right-click installer > Properties > Compatibility > Run as Windows 10. |
In 2021, Kincony updated the firmware for the CB31005 to support modern Smart Home platforms. The "driver download" often includes firmware files (.bin).
Supported Platforms (Firmware Features): Step 2: Run the Installer as Administrator
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