I'm using a Dell Precision T3400 with Windows 7 installed. It has 4GB of RAM, and an Intel Core 2 Duo CPU E8200 @ 2.66GHz. When i install the launcher, it works fine. I can log on and browse it and change settings. When i try to install modpacks, it seems that the installation works just fine. However when i try to run any pack, it completely breaks. It changes for each pack sometimes, but in the end it doesn't work still. For example, if i try to run Tekkit Classic, it almost works; the window for tekkit opens, but it stays white indefinitely. Once closed, the launcher reappears. However, if i try to run Blightfall, the launcher disappears, and then reappears shortly after. I have not been able to find a modpack that works, it does one of the two, no matter how much RAM i dedicate to it. Is there a way to fix this?