I have some computers on my network where DNS resolution in Windows XP Home does not work. I can ping an outside IP address, but I can't ping an outside address if I ping by name. I've tried booting the computer in safe mode with networking and it still has the same problem. I've tried changing DNS servers but that doesn't do anything. I have also reinstalled the drivers but that does nothing for me. The HOSTS file appears to be normal. I have 2 computers that are affected by this and both are Windows XP Home and both occured at the same time. However, I'm in WIndows XP Professional and I don't have this problem. The Home machines are up to date in terms of patches. It is beginning to seem more and more like a virus/trojan to me than some kind of glitch in Windows. Can someone please tell me how to resolve this issue and confirm that this is a virus/trojan?