Oursurfing - Help requested to remove please

Can someone give me clear instructions on how to remove ‘Oursurfing’ using Avast?

Or should I use another clean up option.

Many thanks

follow instructions here https://forum.avast.com/index.php?topic=53253.0
attach Malwarebytes and Farbar Recovery Scan Tool logs

when done, a malware expert will assist you

Monitoring.