I had Ubuntu installed on my Windows 7 machine using wuby.
So, wuby created a root.disk file.
I also had some compiled output of .C files.
Avast scan detected these output files as some kind of threat and asked me to delete them.
I can compile those file anytime. So, I selected delete all.
Atlast, when scan was complete, it also had deleted my Ubuntu root.disk file with same message as above output files.
I lost my whole Ubuntu installation and my networking project created in it.
Does Avast consider C output files and ubuntu root.disk as threat??