Hello. I have a MSI wind Notebook 100U (Realtek wireless card) that connects perfectly in my WEP home network. It also connects nice with others WEP networks and with most cabled network. I had installed Windows 7 three month ago. When it ran Windows XP I had no problems to connect with WPA and WPA2. But in my job, the Wireless network runs WPA or WPA2 with TKIP encryption and now I can't connect anymore. I found a lot of similar problems, but none of them brings me the solution. I follow the administrator instructions: WAP2 - Enterprise; TKIP PEAP Unchecked the Server certificate box under configurations. Authentication methods: EAP-MSCHAP v2 and unchecked Windows username and password at the properties. This configurations were reviewed by the administrators and are OK. He also tried the WPA - Enterprise and It didn't work too. The message I received when I try to connect is "Unidentified Network" and I am not able to switch "local network" or access point among home, corporative and public networks. I have no access to the internet and no IP (just APIPA on "ipconfig /all"). The administrator of the network is not dealing properly with this problems and a lot of Windows 7 users and some Windows vista users are facing the same problem than mine. Interesting is that some Windows 7 and vista users are connecting without problems. The XP computers and Iphone are working fine. I have tried: Updated my wireless card drivers. Disabled the IPv6. TCP/IP IPv4 is enabled. Network discovery is turned on. Printer and files sharing is enabled. Turned of all firewals (including the Windows one) and antivirus and antispywares. The Windows solution to vista problem I have tried on 7: DhcpConnEnableBcastFlagToggle on regedit (Windows Vista cannot obtain an IP address from certain routers or from certain non-Microsoft DHCP servers) On"services.msc", the DHCP client is started (but the logon is running on "this account" not in "local system account" because when I tried to put in this option my home network crushed). I didn't find Bonjour service in my computer. I didn’t install Itunes or other MAC programs. I also tested an USB Wireless card, without success. Therefore I think this is a Windows 7 bug. Some of the solutions will suggest to manually configure the DNS, IP number... But it is impossible to me argue with the wireless administrator in doing that. He explained to me a lot of reasons (that I didn't understand) why I cannot put an IP number manually. It is not my intent to be abrupt or discourteous. I apologize you for my English because I'm not an English expert. I hope you found the solutions. Thanks.