where can I find the full-scan log file ?

I made a full scan, but dont know where to find the log file???
Win7 64bit

You have to have elected to generate a report in the Full System Scan settings - that creates a report file with the same name as the scan .txt

C:\ProgramData\AVAST Software\Avast\report\Full system scan.txt, note the ProgramData folder in win7 may be hidden unless you have changed the Windows Explorer menu > Tools > Folder Options > View > Hidden Folders - Show Hidden files and folders.

Note: the information in here isn’t that complex, so it rather depends on what it is that you are seeking. It will record detections, etc. but not all files scanned as that would be massive.

yes, here they are C:\ProgramData\AVAST Software\Avast\report

The big question is did the log hold the information you were looking for ?

yes, thanks