But alas with using wifi there also comes some risk. As you are sending your information through the air (unlike a physical cable) it can be intercepted or unintended users could access your network.
Here are a few simple steps that will throw off your next door neighbours kid with his skid hacking tools and make your wifi network secure.
WEP and WPAWEP stands for Wireless encryption protocol Wep is practically useless, It can be cracked within a matter of seconds using automated tools that can be downloaded from the internet. Hence why you should use WPA. WPA is more secure and takes more skill to crack.
Mac address filteringIf your router has this option, USE IT.
To find your MAC (or physical address) in the CMD command prompt type 'ipconfig /all'
Copy the physical address and paste that into your 'Allow from only selected MAC' MAC address list. This will make your router only accept traffic from the specified MAC addresses.