After Effects stops responding when importing larger video

Question

Although this is likely a common topic, I've searched just about everywhere for an answer to this new problem I'm experiencing and I have had no luck.
Just recently, out of the blue, when I try to import larger (100+mb) quicktime videos into after effects the program stops responding and it doesn't give me an error message.  Smaller 2mb videos import without a problem but I can't even drag a large video into the comp without it closing down on me.  I've imported 400 rpf pictures in sequence which was 1gb and it worked fine but larger videos just shut it down.  I've tried the following:
- adjusting my OpenGL settings.
- removing my gl plugin
- adjusting my texture memory
- resetting preferences back to default
- purged my image and video memory
- cleared all the caches
- re-installed quicktime and made sure it was the correct version
- re-installed after effects (cs5.5) version 10.5.5.253
- reduced resolution
- swore loudly and cried uncontrolably
I have used this videos many times in the past without problem it just seems that all of a sudden the video is too big making the program shut down.
I'm on Windows 7 Intel quad core processor
16gb ram
Grapics Card NVIDIA GeForce GTX 570 (4064mb ram)
I've checked the graphics card and I'm running the most up to date version.
I hope I have provided enough information.  I appreciate any help in advance.
Andrew

Answer 1

Well, I'd back up all your data first, if you haven't already. You should be doing that all along anyway. (Don't forget things like Photoshop brushes, Animation presets, etc. in your Adobe folders.)
Alright, before we go crazy, I would Google around for instructions on how to completely remove K-Lite.
If, you follow that and it's still messing up, the second thing I would do is to uninstall all your Adobe software.
Then run the CS Cleaner Adobe provides on their website.
Uninstall Quicktime.
Download and install a new version of Quicktime 7 (NOT Quicktime X).
And then reinstall your Creative Suite software.
If, after those steps, it still doesn't work, then you are going to have to go nuclear.
The first step is to back up all of your data. Documents, fonts, project files, stock footage libraries, music, animation presets, project templates, etc. Anything that you've added to the computer (except for programs).
Your computer either came with recovery disks or the ability to create them. Make the disks if you haven't already.
Put them in and reboot the machine. It should give you an option to wipe out everything and install a clean version of Windows. You will then have to reinstall your programs (NOT k-lite ) and put all your files back on the machine.