I am having a problem with Cygwin and after considerable investigation with Cygwin experts have come to the conclusion that something is blocking DNS. This started after some Lavasoft malware was inadvertently installed. It has since been removed and HJT indicates the system is clean. I don't know if that is related but thought I should mention it. Oddly everything else works (browsers, email, etc.). At least I have not found anything else that doesn't work. When I run nslookup, I get this: Code: nslookup google.com Server: UnKnown Address: 192.168.0.1 *** UnKnown can't find google.com: No response from server The server address shown is correct (U-Verse digital router) according to AT&T tech support. That router handles DNS queries. I have a Linux machine configured with the same DNS server and it works as expected: Code: nslookup google.com Server: 192.168.0.1 Address: 192.168.0.1#53 Non-authoritative answer: Name: google.com Address: 220.127.116.11 Name: google.com Address: 18.104.22.168 Name: google.com Address: 22.214.171.124 Name: google.com Address: 126.96.36.199 Name: google.com Address: 188.8.131.52 Name: google.com Address: 184.108.40.206 I also discovered something else that may be related. If I run tracert I get this: Code: tracert google.com Tracing route to over a maximum of 30 hops 1 1 ms 1 ms 1 ms dsldevice.attlocal.net No resources. Again traceroute on my Linux machine works as expected so clearly this is something specific to my Win7. Can someone help me shoot this bug? TIA. FWIW, I have Norton AV but uninstalled it to no avail, so that is not the blocker.