HP Pav dv6500 updating problem/power too

Hello,
Need help with an HP Pavilion dv6500. Last time I used it, it was fine. Went to power up and now I get a message, "Configuring updates 3 of 3: 0% complete. Do not turn off computer." And it tries for about a minute. Than turns itself off. And repeats this cycle. Any ideas? Never had any problems before. Thanks.