Someone help me out please?!

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I need some help on what to do: Something is up with my computer, DID I DELETE a program I need?? 1)I cannot view some graphics on the the internet, etc. I'll see the small 'x' or it has small colorful symbols. 2) when i'm on myspace I can no longer hear the musci on the profile pages, there is just an box image where the music or video was. I'm not good at computers. It is not my Speakers. If you are confused I'll better explain.