This is a little program that flushes the Windows Explorer environment. Similar to flushing disk buffers to the hard drive. I've found on some things such as changing registry entries or disconnecting a mapped network drive, sometimes it can save you from having to log off, then back on to get Windows to let go or take note of something.
It's a stand-alone .exe. It uses no registry or .ini settings. Make a shortcut to launch from the shell or run from a command prompt.