Just out of interest.....
You
have set up the wireless security settings on your router haven't you?
By that I mean: you've turned on the encryption, preferably WPA; you've changed the Admin password; you've enabled MAC filtering?
---------- Post added at 18:29 ---------- Previous post was at 18:28 ----------
Oh.....and yes, you should be able to turn it off, leave it for a week or so, and then turn it back on without it all going pear-shaped