You are advising one of your neighbors about the HomeGroup feature of Microsoft. He wants to make sure that all of his computers support this feature. Which one of the operating systems below does not support HomeGroup?

A. Windows 7
B. Windows RT
C. Windows Vista
D. Windows 8

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The operating system that does not support HomeGroup is Windows RT.

The operating system that does not support HomeGroup is B. Windows RT.

To determine this, you would need to have knowledge about the different operating systems and their features. HomeGroup is a feature introduced in Windows 7 and is also available in Windows 8 and Windows Vista. However, Windows RT does not support HomeGroup.

Windows RT is a version of Windows designed specifically for ARM-based devices, such as tablets. It does not have the same capabilities as the full version of Windows, so it does not include features like HomeGroup. Therefore, if your neighbor is using Windows RT on any of his computers, he will not be able to utilize the HomeGroup feature.