Your problem could be virtual memory...What is that you ask, virtual memory is space in your Hard Drive your computer uses as Ram, If you have windows XP do the following. Click Start in your taskbar,move over to control panel and click,when the window opens go to system,click on it, now the system properties window should open,click on the advanced tab, go to performance and click settings,performance options should open,click on the advanced tab,and under virtual memory click change, click on the custom size button and set the ammount of memory according to your hard drive space,after this is done click set, and restart your computer, I belive this should fix your problem.

Ask me a question, and I'll give you an answer.