I downloaded the files they both run smoothly but arn't as good looking as the as 1080p on my lcd which is what im trying to achieve. There is no skipping but it is still blurred a bit but not to much.
I also download the cccp codec.
Your PC is playing HD files fine.
A new video card wont make any difference.
I'm quite surprised that people on this forum immediately started recommended the spending of money, without finding this out first. Tut tut.
Right, so you want to sharpen the image further?
I use ffdshow filter myself. I hook this up with Media Player Classic. I then use the "sharpen" option, to sharpen the image up further, if necessary.
I suspect that it could be that your monitor isnt upto scratch, but there is nothing wrong with your PC unit itself. Its more than capable of playing HD material.
Also, like the previous guy stated, dont use youtube HD material as a guide to image quality as these videos can actually have poor image quality, even though they claim to be 720p or 1080p.
Please tell me more about this "LCD" you speak of and your current monitor that isnt displaying HD videos as well as your "LCD". Need more info dude.