How can I tell the guy next door is using my wireless modem to access the internet. he used my pc a week ago and his roomate said he configured his and my computers t enable wireless internet from my pc. where do i check on my pc. i have a compaq presario windows vista. i do notice an icon on the task bar that looks like a wireless connection has been made. it only shows up after 5 pm when he’s home. please help. he’s not nice, he should’nt be using a service if I pay good money for it. any advice out there is greatly appreciated.