There are two troubleshooting tool suites available by Microsoft and Citrix, which include most of the frequently used tools for troubleshooting, Windows SysInternals and Citrix Supportability Pack. These are the tools which the average administrator will find handy for their day to day operations and troubleshooting needs.
Windows SysInternals
Troubleshooting with the Windows Sysinternals Tools is the official book on the Sysinternals tools, written by tool author and Sysinternals cofounder Mark Russinovich, and Windows expert Aaron Margosis. The book covers all 65+ tools in detail, with full chapters on the major tools like Process Explorer, Process Monitor, and Autoruns. In addition to tips and tricks in the tool chapters, it includes 45 “Case of the Unexplained…” examples of the tools used by users to solve real-world problems. Buy the book today and take your Windows troubleshooting and systems management skills to the next level. More details can be found at: https://docs.microsoft.com/en-us/sysinternals/learn/troubleshooting-book. The full SysInternals suite documentation can be downloaded from https://docs.microsoft.com/en-us/sysinternals/ The actual SysInternals suite tools can be downloaded from https://docs.microsoft.com/en-us/sysinternals/downloads/.
Sysinternals Live is a service that enables you to execute Sysinternals tools directly from the Web without hunting for and manually downloading them. Simply enter a tool’s Sysinternals Live path into Windows Explorer or a command prompt as live.sysinternals.com/<toolname> or \\live.sysinternals.com\tools\<toolname>. You can view the entire Sysinternals Live tools directory in a browser at https://live.sysinternals.com/.
Citrix Supportability Pack