You must meet the following requirement to use the AIM Expressions:

AIM 5.5 for Windows or later
Internet Explorer 5.5 or later

The minimum system requirements for AIM software are:
Note: 256 megabytes of RAM recommended to use AIM 6.1 features such as file transfer.
- 20MB of free hard drive space
- Microsoft Internet Explorer 6.0 or higher
- 800x600 screen resolution (minimum), 1024x768 screen resolution(preferred)
- Microsoft Windows Vista", XP-64 bit, XP, or 2000 (Windows 2000 with with DirectX 9 required for video chat sessions)
- Dial-Up, LAN or broadband connection
- To use Talk features, a soundcard, headset or speakers and microphone are required.
- To use Video features, a webcam, soundcard, headset or speakers and microphone are required.