Check whether your laptop has a wireless adapter built in (see maker's manual or Control Panel, System, Hardware, Device Manager). If not, buy a USB wireless adapter.
If you already have an internet service you will need a wireless router. If you already have a wireless router you need to check the wireless security passphrase on the router and add that to the wireless adapter on the laptop.
In future, put your story in the space provided, not in the heading where the number of words is limited.