unable to scan window

Avast Free Antivirus / Premium Security
1

if some files wont scan , Do I need to worry about these files
Every time I do a scan , there are the same flies in the unable to scan window
Do I need to worry about this problem ?

2

In my experience about that, you doesn’t need to worried about it.

3

See http://forum.avast.com/index.php?topic=35347.msg297170#msg297170 this topic for more information on why files can’t be scanned.