Only .m4v files crash computer in iTunes 7.2 and Vista

I am running Windows Vista and iTunes 7.2. The computer will crash constantly if I try to do anything to Library or sync to iPod, but ONLY if it involves a .m4v (video) file. If I remove those files, everything in iTunes and Vista work great. Introduce a .m4v file into it, and you get a blue sreen crash. What am I missing here? Is there an incompatability with iTunes 7.2 and Vista when working with .m4v files, or is there an update, or a plug-in needed? I can't find any info on this topic.
Thanks!
Toshiba Portege M405 Tablet Notebook Windows Vista

Are the m4v files stored on a SATA drive on your system?
(Checking here on an nVidia/SATA/Vista thing described in the "Additional Information" section at the bottom of the following document: Troubleshooting iTunes for Windows Vista video playback performance issues.)

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Hello David,
Thank you for contributing to the Apple Support Communities.
It sounds like your Apple TV is having trouble streaming videos from iTunes on your computer. This symptom could have a variety of causes, and I'd suggest the following initial troubleshooting steps.
In addition to restarting your devices (Apple TV, computer, router), try the tips in this article, starting with "Check your home network:"
Apple TV (2nd and 3rd generation): Troubleshooting playback performance - Apple Support
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I wonder if anyone can help. My computer died recently and I couldn't retrieve anything from it including my i-tunes.
I wondered is there any way that I can update a new itunes from my i-pod without having to load all of my cds again ( I have about 1200 cds loaded on my ipod.
Thanks for your help maybe you could post details here or mail me on [email protected]??
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... they are videos that I received on a disc ...
So are they .wmv files rather than .wma's?
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Only .m4v files crash computer in iTunes 7.2 and Vista

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