When I run my Avast, I get a warning that I have viruses bur when I go to put them into the chese I get a message saying assess denied. Could you tell me why?
Most likely because the file is in use.
If you have a NT based system, let Avast run a boottime scan.
How to do this, is explained in Avast help file.
see if its in task manager and eng task, if it is end task it