My quicktime player won't play any videos on my Mac X os. The video will start on quicktime then automatically start

My quicktime player won't play any videos on my Mac X os. The video will start on quicktime then automatically start. I installed DiV X today and all this happened is there anyway to fix this?? I went through everything dragging the icon to the trash and deleting it from safari extentions.

Download and install
Perian from  http://perian.org/
You should read this support page  http://perian.org/#support   in case you need to delete older codecs.  In Macintosh HD/Library/Quicktime/ delete any files relating to DivX (Perian already has them), particularly any DivX extension to Safari. However it should be noted that Perian is not an internet plugin and will not play DivX files imbedded on a website. For that you will need the DivX Player browser plugin available from  http://www.divx.com/en/software/mac  Note that Perian will be discontinued after the release of Mountain Lion:  http://reviews.cnet.com/8301-13727_7-57434082-263/perian-plug-in-for-quicktime-t o-be-discontinued/?tag=txt;title

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