Fixed – wifi not resolving dns on laptop with Windows7

I had a strange case the other day at work when all of a sudden my laptop would fail to resolve dns queries for my wireless connection only – my wired card was not affected. Changing dns entries to another server did not fix the issue. Eventually I tried disabling the Microsoft Virtual Wifi Miniport Adapter (from device manager) and immediately I was able to resolve dns again. Once I discovered this fix I remembered something similar with this adapter. Looking back through my previous notes we had an issue with Shrewsoft’s vpn software – with the Microsoft Virtual Wifi Miniport Adapter enabled we were unable to get a vpn session working to a Cisco client.
So far, disabling this adapter does not seem to have caused any issues – apparently it’s purpose is to allow you to connect to more than one wireless connection at the same time – an unlikely requirement in most business situations.

flushing dns

Had a weird client problem trying to connect to our servers this morning. She switched her machine on and was unable to lookup the address’s of our unix servers, pings came back with host unknown.
Doing a ipconfig /flushdns and a ipconfig /registerdns and it all worked again – I can tell its going to be one of those days again.