After playing for two to three hours and gaining a half-dozen to ten planets (planetoids) or so, and having a few fleets on the map, I begin having problems with reloading saved games. Often, after clicking the "Load" button, the game will freeze up. Going into Windows Vista's Task Manager shows Sins of a Solar Empire as "Not Responding". I'm running my system with 4GB ram, 1.9MB video memory, Radeon HD 3200 graphics card and 2.1 GHz dual core AMD Turion. The game should not freeze up like that with reloading. I find myself having to just shut down the game via Task Manager and completely restart it.