I had a problem with a windows 7 computer that was resolving dns.

yo:~ $ dig @192.168.1.100 coldandheartless.com

; <<>> DiG 9.8.5-P1 <<>> @192.168.1.100 coldandheartless.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50657
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;coldandheartless.com.		IN	A

;; ANSWER SECTION:
coldandheartless.com.	137	IN	A	141.101.117.146
coldandheartless.com.	137	IN	A	141.101.116.146

;; Query time: 4 msec
;; SERVER: 192.168.1.100#53(192.168.1.100)
;; WHEN: Wed Mar 12 13:54:44 CDT 2014
;; MSG SIZE  rcvd: 70

This shouldn’t happen. To turn it off, go to Windows Firewall and then Allow a program or feature through Windows Firewall. Uncheck “Internet Connection Sharing” and you should be good.