I suspect that this problem is with my graphics card but before I buy new one I want to see if anyone else thinks differently.

When I attempt to play streaming video media on my PC both in WMP, WinAmp and Real Player the mdeia will often buffer to the point of loading and then freeze. However its not just the video that freezes, the entire PC freezes including the mouse and keyboard, the sound however continues to play. The only way I can get it back is to restart the PC. It does sometimes play though so I am a bit confused.

Any ideas?