What should you do if MMC does not indicate it's the right tool for partitioning a new disk?

The correct course of action when MMC (Microsoft Management Console) does not adequately display the options for partitioning a new disk is to add the Disk Management snap-in to the MMC. The MMC is a framework that allows users to create, save, and open administrative tools, and one of the essential tools for managing disks in Windows is the Disk Management snap-in.

Adding the Disk Management snap-in enables you to utilize its functions directly within the MMC environment, which provides a graphical interface that simplifies the process of partitioning disks. This approach gives users the required tools to format, partition, and manage disk space effectively.

The other options do not directly address the underlying issue. Reinstalling MMC may not resolve the problem, as the lack of the Disk Management snap-in is the primary reason for the partitioning issue. Using Windows Explorer would not provide the necessary interface for partitioning, as it is mainly designed for file management rather than disk management. Lastly, while the Command Prompt can be a powerful tool for disk management through commands like 'diskpart', it lacks the user-friendly graphical options that the Disk Management snap-in offers, potentially making it more complex for users who prefer a GUI approach.