Windows 7 - Unidentified Network and No Internet Access Errors

I think most Windows 7 user knew this already but I didn't when I started this job as I've never used Windows 7 before.

The Problem
Windows 7 user cannot connect to the local network or internet for no reason at all from times to times.

Error Message
Unidentified network
No internet access

View these error messages here:
http://ssatish.files.wordpress.com/2010/09/status31.jpg?w=325&h=241

Temporary Solution
Method 1: Restart the LAN adapter.

1. Go to Control Panel.
2. If you View by: Category, you should be able to see View network status and tasks link under Network and Internet. Click on that link.
3. Click on Change adapter settings.
4. Right click on Local Area Connection or whatever it is named on your computer and click Disable.
5. After the connection was disabled, right click on it again and click Enable.
6. Wait for a few moment. Windows 7 should be able to connect to the network now.

Method 2: Log off and log on the computer.
Method 3: Restart the computer.

Try Method 1 first and then Method 2 and Method 3 for at least 2-3 times each.

If these don't work for you, visit this forum http://www.tomshardware.com/forum/28594-42-windows-unidentified-network as there are a lot more methods to try.

Either way, these are temporary solutions as it will happen again from times to times until permanent fix is taken.

Permanent Solution
I didn't know there is a permanent solution either until today.

Someone in this forum mention about the permanent fix but didn't mention about how it is done.
http://www.tomshardware.com/forum/28594-42-windows-unidentified-network

I haven't got time to go through with it yet so I just put this link here as bookmark to revisit later for now.