Here I sit two weeks later
still unable to resolve this. How hard can this be?
What operating system are you using? Have you manually gone to Windows Update to ensure you have even the non-critical updates? Do you have the latest version of Quicktime, per the program's requirements?
How much free space is on your C drive? When did you last defragment it? Have you cleared the tmp files and tuned the registry with a program like Advanced System Care, per my books and the FAQs to the right of this forum?
Have you ensured that you're not running any Norton products?
What model of camcorder is your video coming from and how did you get it into your computer?
In Reply # 4 in that large article, that I linked to, there was this:
If nothing is helping, please see this on Got a Problem - How to Get Started.and post the requested details to help in troubleshooting.
I do not know what you have, or have not done, from that article. Can we assume that you tried everything, and in about the order in that article?
If so, what were the results of each operation performed?
Then, assuming that everything else failed (should have been results from the Finding Clues link, but I do not see those, just follow the link above, and share a lot more info with us. Unfortunately, none of us is sitting at your machine, so you need to be our "eyes and ears." Without that input from you, we are totally lost, and have no clue, as to what is going on.
We also need to know what you have done to track the issue down, and the results of each step.
Good luck, and please let us know much more,