Can you inform the file as being a false positive? (click on the bottom right of the virus warning message).
Also to confirm if a file is a false positive, please submit it to VirusTotal
and let us know the result. VirusTotal has a file size limit of 10Mb. You can use VirScan
If it is indeed a false positive, send it in a password protected zip to firstname.lastname@example.org. Please, mention in the body of the message why you think it is a false positive and the password used. Thanks.
Maybe you need to disable Hide protected operating system files
and enable View hidden files and folders
to manage the file(s).
As a workaround, as posted before, you can add these files to the Standard Shield
provider (on-access scanning) exclusion list.
Left click the 'a' blue icon, click on the provider icon at left and then Customize. Go to Advanced tab and click on Add button...
You can use wildcards like * and ?. But be careful, you should 'exclude' that many files that let your system in danger.
This link is a tutorial on how to help correct a virus detection that you believe to be false:http://forum.avast.com/index.php?topic=25009.msg204838#msg204838