Please help me download adobe flash player

Hello,
i have recentley put vista on my pc and even when i had windows i couldent download adobe flash player...
i cant do hardley anything on my computer
i cant check my email
i can't watch youtube or any other videos
when i sign on myspace i can't change my status/mood, there r no pictures when i look threw my friends list, i can't look threw any of my messages other then the first page
i don't know how to fix it at all
i have had this problem sence January.
if anyone knows how to fix this
i would greatley appreasheate step by step instructions
like i stated previousley i can't check my email so if you would please send any reply to this to my myspace if at all possable once again i would greatley appreasheate it

www.myspace.com/katiesxcrazy