I noticed that Firefox has decided to block some EXE installers from my site, showing a label Blocked: May contain virus or spyware. I right-click the file, select Unblock, and this message is shown with the Unblock Anyway and Keep me Safe options:
The file contains a virus or other malware that will harm your computer. You can search for an alternate download source or continue anyway.
Notice that the dialog does not say may; it says will harm your computer.
On what basis is this warning being shown?
No one knows for sure which provider Chrome and Firefox are using for their extensive list of false positives. Some say that the site stopbadware.org is responsible, but I'm not so sure.
Please advise on how to proceed to restore what's left of my sites and software reputation in an immediately effective way, before it's too late. Thank you.
For those asking about the site and software, it's this: http://www.andreszsogon.com/grf-wizard/
The software is mine. It's a simple GUI for a command line tool; I developed it with VB6, compressed the app's EXE with UPX compressor, built the installer with Inno Setup, then uploaded it via FTP. I invite you to install it, test it and scan it all you want.