DavidR
14
The short answer is that it isn’t installed (as in running), it is just part of the overall avast installation, it is just an inert file, that if you wish to run screensaver scans, that is what is used. It is an avast scanning feature, the ability to have avast scan your system when the screen saver is running.
If you haven’t enabled a screensaver in windows and further still haven’t selected the avast screen saver then it won’t be run and that 40KB file will sit waiting on you to enable it.