Avast Runtime Error 42052 is caused due to the incomplete installation of the antivirus software or because of its corrupt download. It can also happen due to corrupt windows registry files. If you are attempting to solve the error manually, then you can try to execute some of the troubleshooting steps such as updating the PC drivers, undoing the recent system changes in the laptop, uninstalling and reinstalling the antivirus software. Other methods can be implemented for solving the error. However, they can be too complex to handle. Therefore, it is advised that you take help from the professional experts by dialing the avast customer service phone number.