TDSSKiller found Unsigned files.

I use Avast for anti-virus and it keeps popping up with a blocked URL or somethin. So, according to some online research, I ran the TDSSKiller application and it found 11 files that were all "Unsigned files". I understand unsigned files aren't necessarily virus'/malware/rootkits/spyware (whathaveyou). But there's got to e something somewhere. Can any one help me? If so, what do you need?

I attached a picture of the Avast error.

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