Do you mean the avast secure browser extension?
Click Menu button and choose 'Add-ons'.
In the left panel, click Extensions and from the add-ons list choose 'Avast Online Security', then select Remove
Or follow the instructions on the following <<< Avast link >>>
Dave
The Service you do for others is the rent you pay for your room here on Earth - Muhammad AliI don't work for Virgin Media.
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