Have resorted to manually removing infection in safe mode. Hope it works. Wonder why Avast! doesn’t tackle it. Alternative approaches welcome!
Start a new topic in V&W and post your logs there: https://forum.avast.com/index.php?action=post;board=4.0
upload Windi.exe to www.virustotal.com and scan it. If scanned before, click rescan for a fresh result
Post link to scan result here
It is not a virus but adware.
Make sure PUP detection is enabled.