How to fix the error code 20 on my computer?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

Error code 20 is a Windows error code that indicates a problem with the registry. This can be caused by a variety of things, but most often it is caused by a corrupt or missing registry key. This can be fixed by running a registry cleaner or by manually editing the registry.

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  • error code - 20
  • error code 20

1. Restart your computer

  1. Boot your computer into Safe Mode with Networking.
  2. If the error code 20 is still occurring, press F8 to open the Advanced Boot Options menu and select Safe Mode with Networking.
  3. After your computer enters Safe Mode, attempt to fix the error code by performing a system restore.
  4. If the error code 20 is still occurring, restart your computer using the Advanced Boot Options menu.

2. Update your drivers

  1. Open the Windows Device Manager by pressing the Windows key + X and selecting "Device Manager".
  2. Expand the "Ports (COM & LPT)" node and see if there is a "USB Serial Port" or "USB Serial Port 2" listed. If there is, right-click on it and select "Update Driver".
  3. If there is not a "USB Serial Port" or "USB Serial Port 2" listed, right-click on the "System Devices" node and select "Update Driver".
  4. Select the "USB Serial Port" or "USB Serial Port 2" that you wish to update and click on "Update Driver".
  5. Select the "Driver" tab and click on "Browse my computer for driver software".
  6. Locate the "USB Serial Port" or "USB Serial Port 2" driver that you wish to install and click on "Install".
  7. Once the driver has been installed, click on "OK".
  8. Close the Device Manager.

3. Reinstall your drivers

  1. Open Device Manager by clicking on the Start button, clicking on Control Panel, clicking on System and Security, and then clicking on Device Manager.
  2. Double-click on the device that is having the error and click on the Driver tab.
  3. Click on the Update Driver button and select the appropriate driver from the list.
  4. Click on the Install button and wait until the driver is installed.
  5. Close Device Manager and restart your computer.

Still not working? maybe try one of these options:

  1. Run a virus scan.
  2. Check for hardware issues.
  3. Repair your registry.
  4. Clean your registry.
  5. Run a system file checker.
  6. Update your BIOS.
  7. Reset your BIOS.