The Avast antivirus software user interface fails to load is a very common technical error that is faced by the people; this error comes up if there is some corruption in the installation process. So, the user should conduct a reinstallation of the software on the system. If needed then for knowing more the user should get in touch with the Avast technicians’ lines are open for the users all the time. All the Avast related issues can be resolved by the experts easily. avast helpline number uk