spamconf folder with old files - how can I delete?

c:\users\all users\avast software\avast\spamconf
This foolder is populated with files from 2012 to 2014 and a few from 2015.

Tried to delete them (because I need more space on my C drive) - but computer refused saying I needed administrator rights - which I have.

What gives?

//Thomas
win764 avast free 12.3.2280

You first need to disable the avast self-defence module - AvastUI > Settings > Troubleshooting - before removing the contents. Don’t for get to enable it again.