Just turn off all the devices.
Reset the router and set it up was WPA or WPA2 if available. Set the password/etc.
Turn on each gadget at time make sure it is working before proceeding to the next one.
And WPA or WPA2 doesn't really matter. I mean, it's not like you're storing OBLs death pictures or anything... ^.
Hell, even using wired connection your personal information can be stolen. Any company that you give your information to just needs to get hacked *cough* Sony *cough& and your information even credit card number gets out regardless....
Can't wait for a credit monitoring service to get hacked and millions of social security numbers get stolen.. oh man that will be the day...