Well you can download expansion packs... but they have to be the Sims 2 expansion packs !!! :0)
You can buy them but you won't be able to install them unless you already have the base game installed.
if you mean the expansions, yea, u can download all of them, but only the newest CD can start the game, once ur in the game all the games will be in it.
Go to your computer memory and remove the the installed miteriall
Use the base game
When you find that you can't install your Windows 8 games you should locate the game you want to install from the Store App. Check and see if it says 'You own this app' or 'Install'. If it's the former then you already have the game installed and if the latter, click on the 'install' option and the game should automatically download for you.
Sometimes.
Yes you need the main sims 2 or sims game to install any other ones like nightlife or bon voyage.
One thing to try is to make sure that you installed the original game in it's default path. Because the expansion looks down the default path and if it doesn't see the original game there, it assumes the original is not yet installed. This may be the reason, I can not be positive though.
To install WildTangent games, first, visit the WildTangent website or access the game through a partner site. Download and install the WildTangent Games App if you haven't already. Once installed, browse the game catalog, select your desired game, and click on the "Play" or "Install" button to download it. Follow any on-screen prompts to complete the installation, and then you can launch the game from the app.
If world of warcraft is no installed on your computer you need to install it again. Your account is just there so you can get on the game after it's on your computer.
Have you pirated the game? If you have, it won't install. If it's a legitimate copy, make sure it's installed in the "Microsoft Games" Directory.
After purchased the game will be exported to not installed double click and press install