When performing a keyword search in Windows, EnCase searches which of the following?

When performing a keyword search in Windows, EnCase is designed to search both logical files and the physical disk in unallocated clusters. This capability is crucial for forensic investigations, as it allows examiners to uncover not only active files stored on the system but also remnants of deleted or hidden data that may still exist in unallocated space on the disk.

Logical files refer to the structured, accessible segments of data on a file system, including documents, images, and other user-accessible files. Searching these allows investigators to find items that are currently visible and relevant to the investigation.

On the other hand, unallocated clusters are portions of a physical disk that are not currently assigned to any files and could potentially contain fragments of deleted files. EnCase's ability to search these areas is significant, as it helps recover evidence that may not be immediately apparent through a standard logical file search.

By encompassing both logical files and unallocated clusters in its search parameters, EnCase provides a comprehensive approach to digital forensics, ensuring a thorough examination of all potential data sources on a device. Therefore, the correct answer reflects the comprehensive search capabilities of EnCase in handling both types of data.