Re: emergency help needed to against hacking!
Have you got any encryption running on your wireless? Also check your rules in ZA to see what network computer IPs you are allowing access to.
Also you may be able to find out through the router what computers are linked to the router wirelessly. Check those IPs against your own computer IPs and you will be able to see which one shouldn't be there if anyone is being naughty.
Also there is an article about securing your wireless network in the article sections I think, might want to read through that too.