Please help me with..?

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okay. so my yahoo isn't working well for some reason. my father updated his portion of yahoo by mistake. and now myself and my mother have been occuring problems on our portion. for instance, we get what seems like a neverending pop-up about an "Internet Explorer Script Error" and it asks you if you want to continue running the scripts on this page and you can click "yes" or "no" (or "X" it out like i do) . if you click "yes" or "no" it does nothing so you must click "X" to get anywhere. but once you do, it doesn't go away. like there are multiple of these windows. and another problem is that mine and my mothers macromedia flash player disappeared due to the update as well. but my father has it on his. does anyone have any suggestions/answers to fixing this? oh and we attempted restoring the computer and it didn't work. please and thank you!