How do I fix stop error code 0x0000007b

i have a thinkpad with windows vista after a microsoft download I got a stop error code 0x0000007b (0x80399bb0, 0xc0000034, 0x00000000, 0x00000000) how do I fix this. it has all my school work on it and need it up asap

Info from Microsoft

http://search.microsoft.com/Results.aspx?qsc0=0&q=STOP%3A+0x0000007B+++Windows+Vista&PageType=99&SearchBtn0.x=0&SearchBtn0.y=0&mkt=en-US&FORM=QBME1&l=1