from Runtimeware.com

Advanced File Integrity Checker
Audits your system folder (as well as upto 20 other folders) for the slightest file changes and/or additions. If any files fail the integrity check, your anti-virus/trojan program will be notified

Registry Watcher
The RegWatch portion of Sentinel will warn your anti-virus program of programs that are trying to start up using the Registry (Sentinel covers all the bases here - even the “not known” startup methods by popular trojan horse viruses such as Sub7 and the newer Beagle worm).

Secure Shut Down
Shut Down your computer with confidence that no viruses or trojans will attempt to corrupt your system. This feature will automatically perform an Integrity Check and a Registry audit - all files that have been changed or modified will be scanned by your anti-virus scanner.

Automatic Logging
Logs every file that Sentinel sends over to your anti-virus scanner; every log can be re-scanned with ease