How to fix Avast Antivirus Error 42139




There are times when you might encounter error code “42139” with Avast antivirus. The error message could appear during the installation of the program, Avast Software related program is running, during startup or shutdown of Windows operating system. More information regarding the error code is available at Avast Antivirus Customer Service.

It is predicted that when the error 42139 appears, it crashes the active program window. Due to the error, computer system crashes frequently with error 42139 when running the same program. Windows might runs sluggishly and start responding slowly to mouse or keyboard input and more.

The workarounds to fix the error code with Avast is given below that would help you to overcome the problems quickly-

Repair Registry Entries Associated with Error 42139:

In order to repair your Windows registry manually, you need to generate a backup by exporting a portion of the registry associated with error 42139-
  • First of all, you need to click the “Start” button.
  • In the search box, type "command."
  • Hold down the CTRL-Shift on your keyboard, and then hit “ENTER.”
  • Here, you will be prompted with a permission dialog box, click “Yes” for further preference.
  • Now, you will see a black box with a blinking cursor.
  • Next, type "regedit" and hit “ENTER.”
  • Select “Export” from the File menu
  • Select the folder where you want to save the Avast backup key in the save list.
  • Type a name for your backup file, in the File Name box.
  • Now, make sure that the “Selected branch” is selected and then click “Save.”
  • The file is then saved with a .reg file extension.
  • Finally, you will have a backup of your Avast! Antivirus-related registry entry.



The above-stated solution steps are easy to follow. On the other hand, you can also have Avast Antivirus Technical Support via toll-free (1-800-439-2178). Here you will get quick help from the certified engineers and professionals who are skilled with high technical knowledge and have great experience in resolving a lot of issues. 

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