Adobe Premiere Pro CS 5.5.2

Up to date as of 3 hours ago

System:

Windows 7

Intel Xeon (R) 3.07GHz

9GB Ram

64bit OS

ATI FirePro V7750 (FireGL) video card

• Source footage is from an HD Camera saved as a wmv file.  Unfortunately as this is a work PC I cannot put any freeware on it that would tell me what CODEC is in the file.
• No error messages
• Chopping occurs before and after rendering in Premiere (clip is fine in AfterEffects for whatever reason)
• Again, cannot check for third party CODECs
• Premiere won't le me choose any other options asides from the mercury playback engine gpu accleration (it's grayed out)
• Problem Happens with final output and previews.

Sorry it's vague, but as this is a work pc I cannot take screenshots or download third-party software to check for CODEC's

As I said in this message, the clip is fine in AfterEffects, even as a preview.  I would just need to get the audio working in AE and I think I could skip premiere. 

Any help is appreciated.

Thanks

One internal drive. 

Video did provide some good insight but questions still remain.

Even at 1/4 resolution for playback I still am having choppiness.  I have a Samsung HD254GJ Hard Drive on this machine.

One interesting thing I noticed is I can't even change it from 'software only' for video rendering and playback, that option is grayed ou.  Is there any way to turn that back on, I think that may be part of the issue.

I secured the .mts files and now the problem I'm having is the yellow 'Media Is Rendering' screen.  Looking on the forums it seems like this is a pretty common problem.  Even when the progress bar in the lower right disappears the screen is still yellow, this happens as soon as I render the .mts file.  Will this go away eventually or are there hurdles I have to jump through in order for this to work?