Windows users can't catch a break with viruses, even when they're getting software for their Apple device. An app called "Instaquotes Quotes Cards for Instagram" was found to contain a worm called "Worm.VB-900," which isn't a threat to iOS itself or any other MacOS platform. However, users who tend to their apps with a Windows machine are susceptible to the baddie -- also known affectionately as Mal/CoiDung-A. Any antimalware should detect it since it's been up to no good since 2009, but Cupertino has already pulled the app and the vendor is working on a virus-free version. Just goes to show -- if you're on a PC, it pays to watch out for worms when you bite into a strange Apple.