MacBook Pro freezes on start up
While navigating a news web site my MacBook Pro slowed down on battery power. Battery was at 90%. I plugged it in. The circle started spinning. After 10 min I shut it down. Now it freezes on start up. I get the gray and blue tapistry, Apple, and spinning wheel for a minute, then the wheel stops spinning.
I did the command V start. The last item says..."air port: handshake complete on en1" Nothing else is displayed after that.
Can anyone help?