In depth system examination
Here's a free gadget from Microsoft:
"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 unique capabilities of Process Explorer make it useful for tracking down DLL-version problems or handle leaks, and provide insight into the way Windows and applications work. "
"Process Explorer works on Windows XP +, Server 2003, and 64-bit versions of Windows for x64 and IA64 processors"
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