hello guys ever since i updated my avast premire to 2303 version it neer counts when i try to do the full system scan ....am i the only one experiencing this? hence now my computer is attacked ...... 
Not being able to do an on demand scan, didn't infect your computer.
Scheduled full scan takes time depending on amount of data and settings.
You can speed up the full scan by disabling the rootkit portion which takes a long time to complete.
