I just resolved a problem where I could not download or install Windows sidebar gadgets in Windows 7. The behavior occurred as I entered the gallery and clicked Download. The popup appeared for the unverified publisher, but when I clicked Install nothing happened. There was no error or any other indication that it failed -- other than the gadget not being installed. I couldn't find anything on the Internet about this problem that was remotely helpful. But, I narrowed it down to InPrivate Filtering....