I encountered a bizarre problem today when working in Windows 7. The 32-bit version of IE 9 stopped resolving DNS. The 64-bit IE 9 compatriot worked fine. Being stumped, I fell back on the following old piece of advice.
open up a command prompt with administrator permissions and issue the following command:
- netsh winsock reset
After issuing the command, Reboot the PC. Once Windows 7 restarted, viola! IE 9 was functional once again.