Ever wondered which program has a particular file or directory open? Now you can find out. Process Explorer shows you information about which handles and DLLs processes have opened or loaded.

The Process Explorer display consists of two sub-windows. The top window always shows a list of the currently active processes, including the names of their owning accounts, whereas the information displayed in the bottom window depends on the mode that Process Explorer is in: if it is in handle mode you’ll see the handles that the process selected in the top window has opened; if Process Explorer is in DLL mode you’ll see the DLLs and memory-mapped files that the process has loaded. Process Explorer also has a powerful search capability that will quickly show you which processes have particular handles opened or DLLs loaded.

Download (Freeware)

What's new in Version 10.1:
Vista process cycle counters in process properties and as column
Service permissions viewing and editing
Workaround for .NET runtime handle leak
Many new I/O columns and process properties
System and per-process I/O bytes history graphs
I/O history minigraph
Memory commit history minigraph
Optional I/O history tray icon
Windows 64-bit for Itanium support