Astrill Setup Manual:How to configure DNS on network adapter on Windows 7
Open Control Panel
1. Click Network and Internet
1. Click Network and Sharing Center
1. Click Change Adapter Settings
1. Right Click Local Area Connection
1. Click Properties
1. Double Click IPV 4
2. Click OK
1. Tick "Use the following DNS server addresses"
then type in 8.8.8.8, and 8.8.4.4 just like on the screen below
2. Click OK
1. Right-click on same network adapter
2. select Status
1. Click details
Under network connection details, you will see 8.8.8.8, and 8.8.4.4 as DNS servers. This is a confirmation that DNS has been set.
1. Click on Close button, then click on Close button again.
Click Windows Start Button
1. type in the search box "cmd"
2. click the cmd button
In command prompt, type in nslookup google.com and press enter key, you will see 8.8.8.8 DNS server is used to resolve website google.com. This is a confirmation that DNS has been set and is working.
To clear DNS cache on Windows XP, type in ipconfig /flushdns and press enter key.