I have a laptop that will not connect to a wireless network. It was working fine until I tried to add it to a workgroup and then it would not connect.
"Windows was unable to find a certificate to log you on to the network" is the error message that I am getting. I have seen other posts about unchecking the "Enable IEEE 802.1x...." box for the wireless network properties and those posts are not helping. Here are some facts:
The laptop is running Windows XP Home SP2, the network is WPA-PSK TKIP, the router is a Linksys WRT54GS V7.
With this the box to uncheck for IEEE 802.1x is not an option for me so....?
Let me know what else you need and thanks for the help!
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I would start by turning off wireless security in the router until you have a reliable connection.
Oh, and turn off firewalls too. Once the connection is established re-enable firewall and it will adapt to new setup.