Quicktime 7.6.4 error 43 saving file, ...

I have Windows XP on a Dell PC. I upgraded to Quicktime Pro, and all was working fine saving video files until I upgraded to 7.6.4. Now I get the following message; "We've run into errors while trying to save this movie. The file was not saved on disk. The error number was -43.

I have tried uninstalling and reinstalling as well as repair with no luck. What should I do to fix this? Can I go back to an earlier version, and if so, how?

Paul

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