ClamWin AV is not a resident antivirus, and does not have the capability to be resident. The only resident part is the signature updater. ClamWin AV can only be used as an on-demand scanner; triggered by the user or another program. Therefore, ClamWin AV does not conflict with Avast or other resident antivirus programs. However, since ClamWin AV program file was recently updated, Avast does occasionally alert on the ClamWin signatures during ClamWin’s update process.