This fatal error 42040 is a runtime error which comes to the surface when users try to access the Avast Antivirus. It is a popular and user-friendly product and customers seldom get any error but customers face this error if the product is partially installed or the installation has been corrupted by the already present virus in the system.
This can also happen if users have recently uninstalled the antivirus and are trying to install it again on the system but are not able to access the application after installing it. This might result in the slow performance of your system and system will crash frequently and the application which you are using will freeze any time and the keyboard and mouse will respond slowly to your every command. In case, you come across with similar issues then you can also read the methods to stop Avast Firewall temporarily via Avast support.
So if users want to deal with this fault and want to tackle this problem without getting into any mess then they should get in touch with our experts through Avast customer service number +1-800-392-9127 freely or if users want to manually deal with the problem then they can follow the below steps.
Instructions users can follow to resolve the fault:
Step 1: As the error occurs due to the partial installation of the antivirus so users have to delete the partial registries and the temporary files relate to the product to deal with the fault.
Step 2: After deleting files users have to perform a full malware scan of their systems to check if the application is infected with a virus or not.
Step 3: Now users have to clean the cache memory of the system and the browser and also the junk files so that they do not hamper the work of the antivirus.
Step 4: Now after that, update the drivers of the systems.
Step 5: Install all the important updates of the windows and then uninstall the Avast antivirus and then reinstall it properly on the system from the official site.
For any technical support call on Avast technical support number toll-free.
If users are still facing any error with their product and are not able to resolve the faults even after following the steps then call to experts through Avast Helpline Number +1-800-392-9127 toll-free without any hesitation from anywhere anytime.