ultimate list of system utilities from Microsoft

Utilities Index

AccessChk
v5.0 (April 28, 2010)
AccessChk is a command-line tool for viewing the effective permissions on files, registry keys, services, processes, kernel objects, and more.

AccessEnum
1.32 (November 1, 2006)
This simple yet powerful security tool shows you who has what access to directories, files and Registry keys on your systems. Use it to find holes in your permissions.

AdExplorer
v1.3 (March 3, 2010)
Active Directory Explorer is an advanced Active Directory (AD) viewer and editor.

AdInsight
v1.01 (November 20, 2007)
An LDAP (Light-weight Directory Access Protocol) real-time monitoring tool aimed at troubleshooting Active Directory client applications.

AdRestore
v1.1 (November 1, 2006)
Undelete Server 2003 Active Directory objects.

Autologon
v2.10 (November 1, 2006)
Bypass password screen during logon.

Autoruns
v9.57 (December 1, 2009)
See what programs are configured to startup automatically when your system boots and you login. Auto runs also shows you the full list of Registry and file locations where applications can configure auto-start settings.