I would suggest that this happens if the actions defined in your policy all don´t work.
I think there are two actions that can be defined when detecting a malicious file.
And if for example you first choose to clean the file and then do delete it, lets say from a cd, both actions can´t be applied here.
So the action taken in the end would be "none".
Thanks Dan, it make sense now why I see sometimes "None". however, in this case file wasn't in CD, it was stored in local machine.
So I'm still not cleared why it failed to delete?
File infected. Undetermined clean error, delete failed
first of all we need to know what your policy settings are (the two steps i mentioned). You can find them in the "on-access-policies".
As we can see here it´s a file wrapped into a .cab-file. I could imagine that he had some problems extracting and deleting this part of the file. So again we need to know what happens in step one and two.
I would highly recommend you to delete the whole file.
Okay so it is the first case,
cleaning failed and afterwards deleting the file file also failed.
Is the file still present on the system? Can you access the file? Can you delete the file by hand?