Problem my laptop lenovo wireless is not working?

Most likely the wireless driver is either not correct or not installed and with what you are saying

google your laptops make and model on lenovo website for the wireless driver

if you have that is the wireless switch on the laptop? Is wireless enabled

if yes to both above could be more annoying like the wireless card but i would say this is less likely

Look in device manager for the wireless adapter. Install drivers if needed. This is not an uncommon problem. You should use the driver from the Lenovo support site.
However, if the adapter shows up in device manager and is OK, it will be have to be set up in the Networks and Sharing center found in control panel. You must select the wireless adapter to be your active default adapter in order to see available networks. Once that is done, you will have to create a new wireless network connection in order to connect. You use your existing home network information. Now-this is tricky- you must click on connect when you finish setting it up. It will be automatic after the first successful connection.
One other comment. If you connect an Ethernet cable you will have to switch to it before it will be active. Windows has to be told which available network to use.

Find either the wireless switch which is on the side of the laptop or find the function key that turns the Wi-Fi card on and off it's up top you pushed it by accident and now it's turned off