The Sysinternals Suite collects all the Windows Sysinternals troubleshooting tools into a single file.
This includes Autoruns, for instance, still the most detailed way to view all the programs that are configured to launch when Windows and various system applications load.
You get Process Explorer, a supercharged version of Task Manager that shows you a huge amount of information about the programs running on your PC, what they're doing, and the resources they're consuming.
Process Monitor offers a powerful way to zoom in on a particular application. Have you ever run into problems with a program that keeps crashing for no apparent reason, say? Process Monitor can log all its hard drive, Registry and other actions, often helping you figure out the cause, and maybe get it fixed.
There's also RootkitRevealer, a simple malware-hunting tool; TCPView, a way to watch your PCs network connections in real time; PageDefrag, a tool to defragment your paging file and Registry; and many others, a total of 66 programs in one, single ZIP file.
Many of these programs really aren't for PC novices. And there's no front end menu to help the less experienced find their way around. Still, these are some of the best Windows troubleshooting utilities in the world, so if you've any interest in trying to solve PC problems then they're an essential download. Go grab a copy immediately.