Hi One of my kids got a couple of backdoor SdBot trojans on his PC. I found them using AVG after he complained it was acting up. I took the drastic action of reformatting and reinstalling. I've since tried reading up on these trojans and they seem pretty nasty (although I don't really know what I'm talking about here). I'd like advice on whether there is any continuing threat. We have a wifi network and I've read that the backdoor sdbots connect to the internet and open you up to hacking attacks. Presumably this is what happened so I'm wondering whether my network is still vulnerable now that the trojans have been removed. Any advice gratefully received. Thanks.