That was going to be my advice too. Honestly, if people weren't so obsessed with wireless, my troubleshooting at work would be cut by about half. But no - their neighbor has it, their fried has it, and their son has it, so they have to have it too.
My house was built in 1900.
I rewired the whole place with CAT5E.
Nothing works better than wired.
I had wireless (and still do) for the laptop while I am eating breakfast or reading the paper in the am....but I get tired of running downstairs to reboot the router and wireless crap all the time. So I am going to do another run and plug it in under my breakfast bar for easy access.
I despise wireless. Rev. Norb: I'd just like to say that four for a dollar Tijuana tacos seemed like a good idea at the time. Please pass the toilet paper.