If you are running a 64-Bit Operating System, you need to be aware of the following:
- You must be running from an Administrator account. If you are not - and are running Vista - then you need to right-click on the AAW.EXE or AOA.EXE file and select "Run as Adminstrator"
- Make sure that your drivers are all up to date. This includes motherboard, video and audio drivers
- Make sure that you run Windows Update to ensure that you are running the lastest Service Pack and all updates for your OS
- Read KB article #28 and install the updates mentioned their.