A step by step guide on downloading the SDK and installing the Emulator for Android 4.0 follows. If you prefer you can also view a step by step video courtesy of PocketNow:
- Download the SDK: http://bit.ly/1IsNM2
- Extract the Zip to a folder on your desktop
- Click SDK Manager.exe
- Put a check in the box for Android 4.0, click Install Packages on bottom right
- Go back into the Android folder on your desktop, open AVD Manager.exe
- Click New
- Give it a name, change the target to Android 4.0
- Click Create AVD
- Hit Start, wait five minutes