The Windows Performance Toolkit can be used to analyze performance during startup, boot up, deferred procedure calls and interrupt activity (DPCs and ISRs), system response, resource usage, and interrupt storms. This feature requires 23.8 MB of hard disk space.
Note: Windows Performance Toolkit 4.1.1 does not support Windows 7.
To get the free Microsoft Windows Performance Toolkit 4.7, you will have to download Windows 7 SDK 7.1 and during installation select only the Win32 Development Tools from the list of programs to install.
These tools; Xperf.exe, Xperfview.exe, and Xbootmgr.exe, collectively dubbed the Windows Performance Toolkit (WPT), can be downloaded for Windows 7, Windows Vista SP1 and Windows Server 2008.
The tools are quite useful to developers, geeks and performance enthusiasts.