DiskPulse gives you real-time monitoring of multiple disks and directories for unauthorized changes.

You will easily be able to save reports and statistics of any changes, export the detected changes to a centralized SQL database, execute custom commands and send E-Mail notifications when Disk Pulse detects any unauthorized changes in your critical system files.

DiskPulse provides you with multiple features that include a real-time disk change monitor, the ability to analyze/filter detected file changes, save disk monitoring reports, full SQL database integration, and monitoring of specific file types. You can also send E-mail notifications, execute custom actions, and use it as a command-line utility if desired.

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Limitations:
Free for personal use.