Infected component.old. Can I delete?

I did a routine scan, uneventful and found that a trojan had snuck into C:\Windows\System32\Config\Regback\Components.old. I wanted to move the file to Avast's virus chest but despite making the chest capacity unlimited and increasing the send file size to double componets file size I can't put it in the chest so my question is can I delete it? Or will that mess up my system. So far it hasn't done anything but I want to get rid of it to keep my system safe.

 

It was identified as Win32: Vidlo-AH.

Edit: I restarted my PC as Avast sucked up alot of memory during the night as I left it running to do it's thing. I came back and rescanned the supposedly infected file and it's not giving me a virus alert anymore. Whats up with that? I got a bad feeling I'm gonna end up doing another scan to find it again LOL.