Hi, I've got two Macbooks and one PC in my house. We had an accident involving some juice and a Macbook, so that's been getting repaired for a month or so. During that time, I bought a time capsule and connected the other two to the internet via that. However, today we got the Macbook back from the shop, connected it to the internet and it has made the internet painfully slow on all three systems. When we turn airport off on the repaired Macbook, the internet goes back to regular speed on the other two. Can anyone please help me? Thank you.