[...]
maybe it's a sign to consider changing your antivirus to something better like kaspersky or bitdefender?
avast is kinda known to be real shit when it comes to protecting you against real threats. and honestly, you will be better off with just windows defender and good browsing habits instead of avast.
I can confirm that exactly, yes. Windows Defender now does an excellent job and we no longer roll out any additional virus software to our customers as it is simply no longer necessary. This not only saves costs but is also noticeable in day-to-day work, as there are no (active) scans running that can massively slow down the speed of the computer.
For delicate matters (downloads from unknown sources, ...) you can also use virtual machines very well. If these are infected, they can be deleted or reset with a single click.