bluescreensucks

im on a toshiba satellite pro l450d-12x on windows 7 professional, i have gotten several blue screens over the past few days and havent got a clue what any of them mean; i've provided a link to the dump files i've gotten as a zip file, if you can help me it'd be MUCHLY APPRECIATED link to dump files - http://cid-a6f94c944d631798.office.live.com/self.aspx/DUMP%20FILES/dumpfiles.zip THANKS IN ADVANCE