I am upgrading my 1 GHz eMac G4 with 1 gig of RAM now at Tiger 10.4 to Leopard 10.5. Once the Leopard upgrade starts running it asks to restart my computer to enter the installation process. The problem is, I restart the computer and nothing happens, it just turns on again and is at my desktop like normal. There are no installation windows what so ever? I have tried restarting to a different account but still nothing happens.