Avast Contact Number: 0808 085 4825

Contact Avast customer services for free by calling their freephone number 0808 085 4825 for technical support with your antivirus software, for sales enquiries and to request a refund.

Alternatively if you would prefer to send a letter of enquiry or complaint you should post it to their UK head office address: Avast Software, 110 High Holborn, London, WC1V 6JS, United Kingdom.

Avast is the largest (by market share) supplier of anti-malware software applications in the world, with over 435 million users.