This worked like a charm. Problem SOLVED! No need to anymore disable/enable the Network Adapter.
It seems there's some Apple installed sevice called Bonjour, used with iTunes, or some special features with CS3 (the suite with Dreamweaver, etc.). If you are NOT using Bonjour, get rid of it by doing this:
1) Open File Explorer and Search for Bonjour, very likely in the C: Disk.
2) Locate the folder where Bonjour is. You should have 2 files there: "mDNSResponder.exe" and "mdnsNSP.dll".
3) Go to the Window Start button, look in "Accesories" for the "Command Prompt", the black little box to write things in DOS.
4) Right Click into it, and chose "Run as Administrator", and then click Yes in the next Dialog Box.
5) Do CD (change directory until you are Inside the Bonjour Directory). You should see at the prompt something like "C:\Program Files\Bonjour>".
6) Now type: mDNSResponder.exe -remove
7) You'll get some answer saying it was done OK.
8) Now type: regsvr32 /u mdnsNSP.dll
9) This will unregister the Bonjour DLL. If you do not understand what this means, never mind.
10) Restart your computer, and once it's up, remove completely the Bonjour directory.
11) By now you should see the icon of the Network connection fully up and running, and it'll stay that way every time you start up Windows.
Credit goes to: " http://www.thewindowsclub.com/remove-bonjour-from-windows "