When starting gVim Portable on a system without installed Vim using administrator rights, it will ask you for registering gVim. If you already have an installed gVim or you start gVimPortable without administrator rights (and enabled UAC) no question will pop up.
Answer from maintainer Chris Morgen:
You are correct; the OLE support should not be there (...) that he worked from the standard installer (gvim74.exe) rather than the build without OLE support (gvim74.zip).
Dear John Haller, may you update the App by a version without OLE (but please with python/dyn)?