Movie Maker 2.6 is for Windows Vista users whose computer cannot run the Vista version of Movie Maker. To test if your computer can run the Vista version of Movie Maker:
1. From the Start menu, click All Programs.
2. Click Windows Movie Maker.

If Movie Maker launches, you should not download version 2.6.
If you get an error message that says, "Windows Movie Maker cannot start because your video card does not support the required level of hardware acceleration or hardware acceleration is not available", download and install Movie Maker 2.6.

System Requirements:
Supported Operating Systems: Windows Vista; Windows Vista Business; Windows Vista Enterprise; Windows Vista Home Basic; Windows Vista Home Premium; Windows Vista Starter; Windows Vista Ultimate
Movie Maker 2.6 requires a version of Microsoft Windows Vista that has the Vista version of Movie Maker already installed