Hello everyone

my name is Pablo, i'm new in this forum and i hope you could help me with a problem that i have some time and i can't resolve.
I have Windows XP with windows media player 10, when i try to see any streaming video from the internet, i succes to hear the voices but i can't see the video.
First, i thought that i have a codecs problem, so i had installed the FFDSHOW codec pack and the Microsoft windows media player codecs but i still can't see the video, only hear it.
I know that the problem happens only with streaming video, i i download the video to my computer i can see him without any problems, but not all the media sources are avelible to download.
I had tryed to choose winamp as the default media player, bue when i try to see streaming video with him, the video got "stuck" and i can't see or hear nothing.
Another thing that i had tryed to do is to "roll back" wmp 10(windows media player) to wmp 9 and than install the codecs pack.. but again, i couldn't see any streaming video.
Could you help me please? i have'nt any idea what is the problem and how can i fix it.
It's possible to "throw out" wmp and install another program to see the streaming video? (like VLC or Winamp)
Do you know anyway to fix my WMP problem?
By the way, i'm sorry for my English, i'm trying to improve it :-)
Thanks a lot!
Best regards,
Pablo.
p.s: here my computer stuff: pentium 4 (3.0), windows XP with service pack 2, 512 memory.