Today Apple released a Windows only update for QuickTime, version 7.7.4. It patches 12 QuickTime security holes. All of the security patches prevent exploitation of memory management flaws by way of maliciously crafted media files.
If you work with Windows XP SP2, Vista or 7 "or later" (presumably including Windows 8) this update is HIGHLY recommended. A link to the Apple's security summary, Apple's support page, as well as the direct link to the software, are provided below:
About QuickTime 7.7.4 for Windows
[NOTE: As per Apple's recent penchant for botching their documentation, *grumble*, at the moment this page is labeled as being for QuickTime 7.7.3, which is entirely UNhelpful. Hopefully Apple will have corrected this problem by the time you follow their link. (0_o)]
About the security content of QuickTime 7.7.4
QuickTime 7.7.4 Installer
Side Topic: Making QuickTime fully 64-bit
FYI: I've been BITCHING at Apple lately to finally update ALL of QuickTime 10 for Mac to 64-bit code. Actually, I've been ranting at them about it for yonks. But now I am privileged to rant at them via AppleSeed. Hopefully we will see a fully 64-bit QuickTime 10 update very soon. Hint hint Apple!
What's still 32-bit in QuickTime, besides QuickTime Player 7:
- QuickTime Plugin.plugin v7.7.1
- AppleIntermediateCodec.component v2.0.1
- AppleMPEG2Codec.component v1.0.2