DavidR
2
What is the exact file name that is being detected, surely that isn’t 1.29GB unless it is detecting the installation file as infected.
What is the infected file name, where was it found e.g. (C:\windows\system32\infected-file-name.xxx) ?
Check the avast! Log Viewer (right click the avast ‘a’ icon), Warning section, this contains information on all avast detections.