Possible Duplicate:
Windows Update destroys my internet connection
After installing the latest version of Windows Update I still automatically connect but can't browse anything on the internet. When troubleshooting I get the error message "Windows can't communicate with the device or resource (primary DNS server)".
When I did system restore to a week ago the internet works again. However, when I then installed Windows Update the internet fails again with the same error message as before.
There is a previous thread referencing this problem: Windows Update destroys my internet connection. However, I don't see that as a permanent solution because I feel I cannot permanently defer installing the update in question.