Tor frees most resources on shutdown, using module *_free_all functions. But we don't free Windows library handles. Here's what we'd need to do: * write a generic function for freeing Windows library handles in winlib.c * call that function to free all the library handles, *after* we've finished using functions from those libraries This change would only affect compat_time.c and ntmain.c. They don't currenly have *_free_all functions. This is low-priority, because Windows libraries are reference-counted. And the two libraries that tor uses are needed for the life of the process. For details, see https://docs.microsoft.com/en-us/windows/desktop/api/libloaderapi/nf-libloaderapi-freelibrary