I need to know how do I block a wireless computer from hacking in to my belkin router to my internet
You have quite a few options.
1.) If you don't use the wireless feature of the router yourself, you can turn it off completely (Most secure)
2.) If you do use the wireless feature, on most routers you can set up an access list of which computers are allowed to connect to your router (Second most secure)
3.) Again, if you use the wireless feature another option is to put a WEP key for your router. (Least secure)
Depending on your router and your situation, you can decide which option best fits your needs. If you need further information or help with any of them, let me know.
1.) change the default router access password( the password you enter before you can access the router)
2.) set up wireless encrption like jhunter said wep is the weakest with WPA being the strongest
3.) set up mac address filtering (google that exact phrase to find out more about
4.) turn off wireless SSID broadcast - if your routers not telling any other device that its there they have to know your SSID in order to access your router then they need the password.
5.) with enougth time a hacker can get into any system they want to.
put a password,I mean lock your internet connection with a password,a good one it must be in the options ,and with this way your wireless internet will be protected