Microsoft Sysinternals Microsoft’s SysInternals suite is a great, free addition to an IT Professionals USB flash drive— http://technet.microsoft.com/en-us/sysinternals/bb842062 These tools are in continued development, and include features for Windows 8. The author is fond of saying (& accurately), “When in doubt, use process explorer” More information— Mark Russinovich’s blog , http://blogs.technet.com/b/markrussinovich/ Windows Sysinternals Administrator’s Reference , http://technet.microsoft.com/en-us/sysinternals/hh290819 Windows Internals , http://technet.microsoft.com/en-us/sysinternals/bb963901 .(not the same as the above, rather a great book on a different topic area)