I think I see what the problem is...
The Process Explorer download link is for a .zip archive that contains a .chm file, an EULA.txt file and a standalone executable, procexp.exe
Try this little workaround:
Go to where you downloaded the zip archive (ProcessExplorer.zip from
Process Explorer)
Right click the zip file, select "Extract All..."
Browse to Computer/C://Program Files/
click "Make New Folder" (and click through the UAC windows to allow yourself permission to make a new folder)
Name the new folder "Process Explorer" (or whatever else you want to all it), click ok, and allow
Click ok to extract.
Now you should see the 3 extracted files in your newly created folder.
Double click procexp.exe to run the program and watch the folder contents... Did you see what happened?
procexp64.exe appeared. If you exit or close the program, this file dissappears!
Before we go any further, delete the procexp64.exe shortcut from your taskbar.
Now, with procexp.exe opened, right click procexp64.exe and select copy, then in the Process Explorer window, right click in a blank space a click paste. This will result in a new file called procexp64 - Copy.exe.
Exit the program and rename the copy to procexp64.exe, then drag it to your taskbar to create a new shortcut.