Can't Connect Through Router To Internet

My wife's laptop says that she is connected through our wireless router to the internet, yet internet pages won't load. My laptop works fine with this router, as does my kindle and our printer. We tried using a different wireless router at our home, but had the same problem. The problem started when my wife transfered her hard drive from one laptop into another. Everything on the new laptop works fine except the internet connection. We tried reinstalling the operating system from the original discs, but this didn't fix the problem. We took it into a computer shop, and it connected fine through their wireless router, but still won't connect through our router at home.