[Fixed!] Runtime Error 8020 Error Reading Comm Device Windows 10 - MiniTool

Runtime error 8020 (read communication device) after Windows update or upgrade? This article will analyze the causes of this error and provide solutions for you.

Runtime error 8020: Read communication device error

Runtime Error 8020 Usually indicates a problem while reading the communication device. This error may be caused by a hardware or software problem.

Hardware issues: damaged cables, connectors, or communication equipment; improper connection between the computer and the equipment.

Software Problem: Some applications or drivers may hinder the proper operation of communication devices.

Runtime Error 8020 Symptoms of reading communication device error:

• Error 8020 Suddenly appears and causes the program to crash.
• When running a specific program, the computer crashes due to reading the communication device error 8020.
• The computer was frozen briefly.
• Windows responds to keyboard or mouse input slowly.

Try the following quick workaround:

• Make sure all cables and communication devices are securely connected.
• Check whether the port is damaged.
• Connect the communication device to another USB port.
• Connect the communication device to another computer.

Because the runtime error 8020 can cause the computer to freeze or crash, it is crucial to back up the data. It is recommended to use MiniTool ShadowMaker and other backup software for backup.

If the system crashes or freezes causes data loss, you can easily and quickly restore files using the backups you created. This free tool is used to back up files, folders, systems, disks, and partitions on Windows 11/10/8/7. Download and try now!

How to fix runtime error 8020 Read communication device error?

Method 1: Reinstall the driver

Outdated or incompatible device drivers may cause runtime error 8020. You can try to update or reinstall the driver. The operation steps are as follows:

Step 1. Press Win S to open the search bar.

Step 2. Enter Device Manager in the search bar and press Enter .

Step 3. Expand Universal Serial Bus Controller or Ports (COM & LPT), right-click the driver you want to uninstall, and select Uninstall Device.

Step 4. Restart the computer and Windows will automatically reinstall the drivers at startup.

See also:

• How to update drivers in Windows 11? Try these four methods!
• How to roll back a driver in Windows? Step by step guide

Method 2: Uninstall conflicting software

Some conflicting software may not work properly on your device, so you need to uninstall it to check for any improvements. The operation steps are as follows:

Step 1. Press Win R to open the Run dialog box.

Step 2. Enter appwiz.cpl and press Enter to open "Programs and Features".

Step 3. Right-click the conflicting program and select Uninstall.

Step 4. Click "Uninstall" to confirm your operation and follow the on-screen instructions to complete the process.

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