Avast issues with my app

Hi all.

I have developped a very small app for a client wich generates a word document with combobox selections and a small access database.

When I run the app AVAST AVAST antivirus tells me that it has finished the app although it has not found any malware, due to "The file prevalence/reputation is low". It will run in Sandbox.

Is there anything I can do? Can anybody point me out where to find a solution for this? I have been googling aorund but cannot find where to search or what to do.

I would appreciate any help.

Thanks in advance
A

You can get a digital certificate from a reputable source and use it to sign the app.

Thank you jmcilhinney. I signed the clickonce manifest. I used a personal certificate for that. Is this nonsense? (When I look into he details it says it is valid), but should I get a Certificate elsewhere, like Comodo, for example?

Still having same issue.

Do I have to sign also the assembly with a strong name? Or has this nothing to do.

Thanks for your help
A

Other developers are having this same problem with Avast.
Some workarounds suggested on the Avast forums are:

1. Change autosandbox mode from 'auto' to 'ask'
2. Uncheck the offending reason (note that you will lose protection against that reason)
3. Turn off autosandbox (not recommended, but if it is too annoying, you might want to do that).

Here is a link to an Avast statement on this detection feature that explains what it is doing.
http://www.avast.com/pr-avast-softwa...he-clean-files

I use method 1. When you make significant changes to your app Avast will ask about it again, but that's a small price to pay for the protection you get.

Thanks Garran and Paul. But the problem is not on my own computer. The problem is on clients side, I cannot ask him to alter his security settings. And if I could, i don´t know if he does know how to do it.

On the other hand, I have been asking, and a Verizon certificate here in Spain would cost around 400 Euro a year. Thats much too expensive for the basic software I am developping.

So, I don´t know what to do.

Do you think there is a specific snippet in the code that brings Avast to open it in the sandbox, and if so, is there a way to know what piece of code it is, or is it the normal bahaviour when there is no certicate?

Many thanks for your help

EDIT: I found something: http://forum.avast.com/index.php?topic=76650.180

Thanks Radjesh, very interesting. It helps a lot to see others have the same problem. :) I will have to tell our client to set his avast sandbox to "ask" position. Its not a nice solution, but I don´t see another way.

Thank you very much for the search, I searched myself in the avast forum, but didn´t find it.

A