Are you having iTunes video playback problems?

Question

Do you have iTunes Store-bought videos whose playback is terrible, all choppy and full of freezes while playing back in iTunes?
Have you copied one of those iTunes videos to a thumb drive and had it play back perfectly?
This problem is not fixed by any of the Quicktime adjustments that Apple suggests on their "how to fix video playback issues" page, and, aside from this video playback issue, iTunes is working fine on my machine. As I said, the videos work fine, too, if played from a thumb drive instead of the hard drive.
This has been going on for weeks, and people have been posting about it here on the forum, but, to my knowledge, there's no fix. Just silence.
It might be useful if people who are seeing this problem post some information about their systems. For all I know, all of us who are seeing this problem have one particular vendor's computer.
The computer I am having this problem with is a new HP laptop that came with Vista. This one:
http://h10025.www1.hp.com/ewfrf/wc/genericDocument?docname=c00846935&cc=us&dlc=e n&lc=en&jumpid=regR1002USEN
1.6 GHz AMD Turion ™ 64 X2 Dual-Core Mobile Technology TL-52
2 X 512KB L2 Cache
2048MB DDR2 System Memory (2 Dimm)
NVIDIA GeForce Go 6150 (UMA)
120GB 5400RPM (SATA)
I think the problem has to do with SATA, but I don't really know, except that my computer has it and I am able to play these videos perfectly from a thumb drive but not the SATA hard drive.
If you are having this problem, please consider posting your computer's info. Thanks.
HP Pavilion Entertainment PC   Other OS   Vista

Answer 1

OK, I figured it out... I too have a dv6000 with Vista and I have been trying to fix this terrible itunes video playback thing and this is what I found. For whatever reason the NVidia driver in the dv series doesn't play nice with Vista. They say that they are looking into it but have no response other than that. Somehow the data from the hard drive isn't fast enough. So, reading this I figured that if that REALLY is the problem that I could use a external drive and have the videos come from there, and Voila!! It works like a charm, no skipping, no stalling, no more blue screens. I hope this is helpful, I know what a pain this can be.
ALSO, apparently some think that you can't watch itunes video while using Vista's "ReadyBoost". I haven't had that issue personally, but I have seen a lot that have who disabled it and had it work fine.
Let me know if this works for everyone else.
Later
S