Can you inform the file as being a false positive? (click on the bottom right of the virus warning message).
To know 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 also.
If it is indeed a false positive, send it in a password protected zip to virus@avast.com. 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, 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.
