Avast 32, ¿is this really a virus

I decide to give avast32 a chance, but it's giving me a message that hundred of files are infectd by the "win32:cakogen [trj]" virus. I had no problem using f-secure antivirus, and my computer it's not doing "virus" things to let me think that those messages area real. I search at many virus librarys and there's nothing about a virus like that, I search at avast32 virus site and again nothing, and of course nothing at the web.

What do you think?
 
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