I know I can see all running processes in Task Manager. But how can I see the single threads that run inside these processes?
Get Process Explorer.
Enable Show Details for All Processes from the File menu:
In the main pane, select the process you're interested in:
Open the context menu (right-click) for the selected process and click Properties:
On the Threads tab, you'll be able to see a list of the running threads inside that process:
If your troubleshooting requires you to get more detail, it is often very helpful to load debugging symbols into Process Explorer. This is how:
If you don't already have a Windows debugger installed, you're going to have to install the Debugging Tools for Windows first.
In Process Explorer, open Configure Symbols... from the Options menu:
If you have the Debugging Tools (or another Windows debugger) installed, Process Explorer will automatically find the
dbghelp.dllfile. Otherwise, set the correct path here.
The Symbols path should look something like:
The only part you'll want to adjust is
C:\Symbols. That's the location where the debugging symbols will be cached.