See what programs are configured to startup automatically when your system boots and you login. Autoruns also shows you the full list of Registry and file locations where applications can configure auto-start settings.
View the resolution of the system clock, which is also the maximum timer resolution
Pentium-based performance tool
This monitoring tool lets you see all file system activity in real-time.
NT doesn't allow access to internal performance settings like execution quanta, which have different values on Workstation and Server. Here's an applet that will let you "frob" the foreground and background quanta on a system for experimentation, or for your liking. This update works on NT 4.0 SP 6a.
This handy command-line utility will show you what files are open by which processes, and much more
Use Microsoft kernel debuggers to examine a live system.
See the order in which devices are loaded on your WinNT/2K system
List the active logon sessions on a system
Enumerate the list of file rename and delete commands that will be executed the next boot
Process Explorer v10.2
Find out what files, registry keys and other objects processes have open, which DLLs they have loaded, and more. This uniquely powerful utility will even show you who owns each process.
This applet reports processor and Windows support for Physical Address Extensions and No Execute buffer overflow protection.
Obtain information about a system
Show users logged on to a system
The PsTools suite includes command-line utilities for listing the processes running on local or remote computers, running processes remotely, rebooting computers, dumping event logs, and more.
This monitoring tool lets you see all Registry activity in real-time.
The ultimate Object Manager namespace viewer is here.