The Sysinternals Video Library (published by David Solomon Expert Seminars) is set of six DVDs that cover essential Windows troubleshooting topics. Each video is personally presented by Mark Russinovich (Technical Fellow at Microsoft) and David Solomon (noted Windows internals expert and trainer), authors of the official Microsoft Press book on the Windows operating system, Windows Internals. They are known from past Microsoft conferences to be especially informative and entertaining when presenting together.

The entire Tour of the Sysinternals Tools video as well as samples of the other titles are available for free download.

You can check out topics like:

Tour of the Sysinternals Tools
The history of Sysinternals, an overview of the site, and a fast paced tour of the major tools.

Troubleshooting with Process Explorer
Identify malware, account for CPU usage, solve hung and runaway processes, and locked files.

Troubleshooting with Filemon and Regmon
Solve application and system problems with these key troubleshooting tools.

Troubleshooting Memory Problems
Understand process and system memory usage, identify memory leaks, and properly size your paging file.

Windows Crash Dump & Hang Analysis
Learn why Windows crashes and how to analyze crash dumps and hung systems.
(I've seen Mark present on this topic at TechMentor, where he made my head spin with tales of spin locks and serial port debuggers. Though we can't seem to get Mark to come to TechMentor any more since he's so busy, we have found Bruce Mackenzie-Low who does a similarly excellent job with this topic.)

Troubleshooting Boot & Startup Problems
Learn how Windows boots, troubleshoot errors during logon, and fix unbootable systems

Check them out at:
http://www.solsem.com/videolibrary.html