What is the default wireless encryption in WIN7 (type and key-length)? How do I tell what it is using for encryption, and how do I change it. I tried to connect to my existing 802.11g network which has WEP encryption, but was refused.

the "default" is none, that is set per connection.You have not really provided a bit of info to help you out.can you connect if the disable wep or change to wpa2??can you connect to other AP'smake model AP and wi-fi gear you are using.If the gear is NOT on the list..you may be buying new gear.http://www.microsoft.com/windows/compatibility/windows-7/en-us/default.aspx

besides the above information, I would like to know what error is received when trying to connect.For more information about wireless security encryption, please refer to:setup a wireless network:http://windows.microsoft.com/en-us/windows7/Setting-up-a-wireless-networksetup a security key for a wireless network:http://windows.microsoft.com/en-US/windows7/Set-up-a-security-key-for-a-wireless-networkVivian Xing - MSFT