GMER is an application that detects rootkits .

hidden processes
hidden services
hidden files
hidden registry keys
hidden drivers
drivers hooking SSDT
drivers hooking IDT
drivers hooking IRP calls

GMER also allows to monitor the following system functions:

processes creating
drivers loading
libraries loading
file functions
registry entries
TCP/IP connections
GMER runs on Windows NT/W2K/XP
[License: Freeware| Requires: Win XP/2K/2003 | Size: 297 Kb]

GMER 1.0.11.11349