What operating systems are supported?

Sentry 3.0 is verified to work on Windows XP, Windows Vista, Windows 7, Windows 2000, Windows Server 2003 and Windows Server 2008, 32-bit and 64-bit editions.

How long do I have to try the software?

The trial period is 30 days.

 Sentry is running on a computer, and my network settings are correct, but SentryManager still can't detect it. Why?

Check to make sure access is not being blocked by Windows Firewall: http://support.microsoft.com/kb/842242