It’s probably a false alarm.
Just open the virus chest (when you start the Simple User Interface, click on the “Chest” image, or select it from the menu). Now, rightclick on the Media Builder.exe file in the Chest and select Email to ALWIL Software.
Where can I find the chest? In the “C:\Programme\Alwil Software\Avast4\DATA\chest” is no image and only one xml file and four files (from 00000001 till 00000004) of the Typ “datei” (means: file)
The file is back on its place, but and its normal, the next scan gave me the next allert. Is there an allert every time or would it be fixed by the next update?
There is every likelyhood that it will be resolved soon in an iAVS update. In the meantime you could ad the file to the exclusions list for normal scans.