This is the correct forum to post into. Now, can you provide a bit more info? This ARTICLE will give you some tips on what would be very useful, and also some tips on how to find some of it.
Also, please update your video card's driver to the very latest version. If you have an ATI, note: there were some fairly recent versions of the ATI Catalyst drivers, that did not work well with Adobe programs. Many users found that they had to roll-back a few versions. I would assume that by now, ATI/AMD has fixed that, but keep that in the back of your mind.
Read Bill Hunt on a file type as WRAPPER http://forums.adobe.com/thread/440037?tstart=0
What is a CODEC... a Primer http://forums.adobe.com/thread/546811?tstart=0
What CODEC is INSIDE that file? http://forums.adobe.com/thread/440037?tstart=0
Work through all of the steps (ideas) listed at http://ppro.wikia.com/wiki/Troubleshooting
If your problem isn't fixed after you follow all of the steps, report back with ALL OF THE DETAILS asked for in the FINALLY section
And what is NOT in the trial http://kb2.adobe.com/cps/407/kb407938.html
How would I go about updating my video card? I tried looking through control panel but I couldnt find how to update my video card.
Thanks for the quick response
Control Panel>System>Hardware>Device Manager will give you the list of hardware. Find your video card in that list, and then choose its Properties, which will bring up a dialog screen and you will choose the Driver tab. That will tell you which driver you have. Write that down and STOP - do not use any driver updating available there. Instead, go to the ATI/AMD Web site. Find the Driver Download link to get to that page. Plug in your video card, and your OS (might be a text box, or a drop-down), and find out the latest driver available. Go to the Download link and download it to your system. Read the installation instructions, as the exact process can change. Usually, it as simple as just Dbl-clicking on an executable file, and the rest is done automatically. Reboot, perhaps make a few settings changes, if prompted, and you are done. Still, read the instructions. For one of my nVidia drivers, I had to first reset some settings in my nVidia console, and THEN running the executable file. Had I not read first, I would have missed that. In previous versions, and later versions, that step was not required, but for one version of the driver, it was.