EventSentry supports all x64 editions of Windows, including Windows Server 2003/2008, Windows XP, Windows Vista and Windows 7. Support for these versions is accomplished through the 32-bit compatability mode of these systems. A native 64-bit agent is planned for the 3.0 release of EventSentry.
You can install EventSentry on x64-bit systems either through the supplied setup application, or remotely using Remote Update (recommended).
All EventSentry functionality is available on 64-bit systems, with the exception of 64-bit performance counters, which cannot currently be monitored by the 32-bit agent.