WIRELESS CONNECTION

Go to the Device Manager and check Wireless Network Adapter properties. Is the Wireless adapter installed, working properly and enabled? If not then reinstall the wireless LAN driver.

If it is OK then go to the Control Panel and click on Network Connections and right click on the wireless connection anf then click on Repair. This will make the wireless router issue a new IP address to the wireless LAN card and you whould now get access to the Internet & your network.
If this doesn't work power down your wireless router wait 1/2 minute, power up and boot up your laptop after all the normal LEDs on the wireless are on.

Let me know if you still have problems plus all error messages.