|OK fine I take your word for it. Seems strange English though (not supported would have been more usual, so that's why I wondered if there was anything else that said exactly what wasn't supported ).|
Have you tried starting in Safe Mode? Tap F8 while booting and select "Safe Mode with Networking" from the list. If you can get into Device Manager in either of the Safe Modes it might show some errors in "Network adapters" (usually yellow or red markers).
The other place to look (if you can get there from Safe Mode) is Control Panel > "Network Connections".
What are the details of your network - Wireless, Router, Cable connection to Router etc?
Always pop back and let us know the outcome - thanks