Sqad. If my memory serves me rightly, you have a satellite internet connection. I am not familiar with these but why are you using two routers ?
Unless you live in a mansion, than one router, centrally placed should allow any PC to pick up a signal ( perhaps you do live in a mansion, or should that be hacienda ? )
Have you tried swopping your PC and her laptop around ? If her laptop won't work in your room, than it can't be down to the router.
Sorry...can't think of anything else, other than what has been said already.