hello I just got the demo must I register the numers they show…and when I run the full system scan ,when it finds a virus it say ''move to ben and when I ggot to move it,it gives me a error message is this because I did not register and use the demo numbers???
Hi jester, and welcome to the forum.
The demo version is fully functional for the first 60 days. You do not need to register to remove the malware during this period so there is some other reason for the errors.
Please post the errors you’re receiving (possibly a screen shot) and also let us know your operating system.
Hello and Welcome to the forum 
Also in case you are using the Home version you can register for free at http://avast.com/i_kat_207.php and recieve a free registration key 