Harmful webpage URL:Mal on explorer.exe

Hi, spending hours on my Dads PC trying to clean up but this last one has me baffled. Looking at other posts on this it appears there is no generic fix and is specific to the machine. Details:

http://kjhaskdjhkuhk2qwskjakjshdkjh123kjs2.in/index.php
URL:Mal
Process: C:\Windows\explorer.exe

IS this a false positive or is there anyway to remove? Cannot find anywhere on c: or in registary.

Any help much appreciated.

Thanks

Andrew

Instructions https://forum.avast.com/index.php?topic=53253.0
Attach Malwarebytes and Farbar Recovery Scan Tool logs … 3 logs total

See below the box you write in … Attachments and other options

As you have discovered, this infection is unique on each system. When you provide the logs asked for, we can give you a specific fix for your system. Thanks.