This is a revised, edited, cross-referenced and thematically organized volume of selected DumpAnalysis.org blog posts about crash dump analysis and debugging written in July 2009 - January 2010 for software engineers developing and maintaining products on Windows platforms, quality assurance engineers testing software on Windows platforms, technical support and escalation engineers dealing with complex software issues, and security researchers, malware analysts and reverse engineers. The fourth volume features: - 15 new crash dump analysis patterns - 13 new pattern interaction case studies - 10 new trace analysis patterns - 6 new Debugware patterns and case study - Workaround patterns - Updated checklist - Fully cross-referenced with Volume 1, Volume 2 and Volume 3 - Memory visualization tutorials - Memory space art