Windows Explorer caches DLLs (Dynamic-Link Libraries) in memory for a period of time after the application using them has been closed. This can be an inefficient use of memory.

1. Find the key [HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentV ersionExplorer].
2. Create a new DWORD sub-key named ‘AlwaysUnloadDLL’ and set the default value to equal ‘1′ to disable Windows caching the DLL in memory.
3. Restart Windows for the change to take effect.