1

I just had popup in W10 notification indicating antivirus is out of date and asking to open avastremediation.exe.

Seems queer to me. What say?

2

If the file is on your drive submit it to virustotal.
Do NOT run it as it doesn’t seem a file from avast to me.

Also follow these instructions > https://forum.avast.com/index.php?topic=194892.0

3

See thread Topic: wsc_proxy.exe and post by igor. https://forum.avast.com/index.php?topic=207621.0

Seems to tie in ok