wireless says no internet access on startup

This is more of an annoyance than a critical problem. I have a new Sony Vaio Z13. Wireless is an Intel Centrino advanced-n 6235.

Wireless works fine, no connection issues. However the network icon in the task bar has a yellow triangle, and in network and sharing it says I am not connected. if I do an ipconfig /release and then /renew the issue goes away.

event viewer shows warnings for wlan extensibility module stopping, and many errors for:

Your computer was not assigned an address from the network (by the DHCP Server) for the Network Card with network address 0xC485084EFE27.
Your computer was not assigned an address from the network (by the DHCP Server) for the Network Card with network address 0xC485084EFE26.

Hi There

Try to forget all the remembered networks in network and sharing centre

Try to change encryption parameters (type -- none, WEP or WPA, and key)

Also check the signal strength

Let me know

Cheers