If a movie link indicates QuickTime, I now avoid it like the plague.
It sounds like an operating system issue. Despite the reports of obscure vulnerabilities, QuickTime is generally safe to use and it has the best-quality video technology available. Unfortunately, Windows users have been terrorized by malware for several years, and now many of them are afraid to do simple things like downloading a file, opening an e-mail or watching a video. Computer users shouldn't have to live in fear of the Internet, but that's the way it is for Microsoft customers. It's a lousy way to experience the network, in my opinion.
How about a link to a supposedly adware or spyware-carrying QuickTime content...