It appears that either the wireless driver is not installed or not configured on your laptop. If you have already installed the wireless driver then :-
Click on Start - Control Panel - then Network Connections - then right click on your Wireless Network connection - click on Properties. Then in "This connection uses the following items, scroll down to Internet Protocol (TCP/IP) and click on Properties. Under the General Tab make sure Obtain an IP address automatically and Obtain DNS server address automatically are selected. Click OK.
If you do not see TCP/IP in the Wireless Network Connection then click on the install button and then install the TCP/IP driver.
IF TCP/IP is OK then before you do the following, turn off or disconnect the power to your wireless router, wait for 1 minute before connecting the power again. Wait till the LED lights indicate that it is on line again and the wireless is on then :-
Click on Start - Control Panel - then Network Connections - then right click on your Wireless Network connection - click on View Available Wireless Networks Do you see your wireless network (ie. your wireless router)? If so click on your wireless router and then click Connect.
You can also click on Repair to try to reconnect to your wireless router. Let me know if it works.
Answers & Comments
It appears that either the wireless driver is not installed or not configured on your laptop. If you have already installed the wireless driver then :-
Click on Start - Control Panel - then Network Connections - then right click on your Wireless Network connection - click on Properties.
Then in "This connection uses the following items, scroll down to Internet Protocol (TCP/IP) and click on Properties. Under the General Tab make sure Obtain an IP address automatically and Obtain DNS server address automatically are selected. Click OK.
If you do not see TCP/IP in the Wireless Network Connection then click on the install button and then install the TCP/IP driver.
IF TCP/IP is OK then before you do the following, turn off or disconnect the power to your wireless router, wait for 1 minute before connecting the power again. Wait till the LED lights indicate that it is on line again and the wireless is on then :-
Click on Start - Control Panel - then Network Connections - then right click on your Wireless Network connection - click on View Available Wireless Networks
Do you see your wireless network (ie. your wireless router)?
If so click on your wireless router and then click Connect.
You can also click on Repair to try to reconnect to your wireless router.
Let me know if it works.