Per Mirelly's sticky: Prepare Your Game Files and Computer For The Expansion First Play each family that is important to you so that you can be sure to save each family so that all members are home and no visitors are on the lot. Best advice is to save at 5:00 am (game time - not real time ) Try to avoid saving families with unresolved problems for example:- sim about to grow up sim(s) at work/school honeymooners not present waiting for a nanny or taxi etc. outstanding repo man or social worker warnings. If you pay very careful attention to the first two items you will have far fewer problems than if you ignore them. When you are happy that all your important families are safely saved ... Back Up Your Saved Games - Don't know how? -click here Delete your downloads folder - Don't know how? -click here Check that your display drivers are up to date - Don't know how? -click here Finally run a hard drive analysis and defrag if recommended - Don't know how? -click here Congratulations! Your PC is now utterly ready to receive a new Sims 2 expansion pack! Why does she say to DELETE your downloads folder? I mean I know you have to back it up, but then you should delete the folder completely? Is this only for when you add an EP or does it apply to when I uninstall everything and then reinstall everything? Thanks!