Anomaly scan on system

Hello users of Avast I wanted to tell that I just encountered a problem with Avast during the full system scan, it seemingly starts a full scan of the computer, the same start but always as a percentage of 0% as in the picture below:

http://www.webalice.it/alonardi/avast1.jpg

Scanning result with error :

http://www.webalice.it/alonardi/avast2.jpg

The same anomaly has been observed even with the fast scan

Avast used: 2014.0.9.2009

thanks for the advice given to me