Do Not Enter Sign on Macbook Pro. 2010 13 inch

Hey Guys,
1.5 years into the life of my MBP and somethings gone wrong. Was getting the Mac out of sleep and it froze so I hard rebooted it, and it went to normal start up and then the Do Not Enter Sign came up and after googling it, tried everything. When i go into Disk Utility from the disc, it doesn't see the hard drive, only sees the disc itself. Weirdly, i dont know if anything's wrong with the hard drive since I have boot camp on the Mac, and I can log windows and even access the Macintosh partition and take files out. if anyone has any ideas, greatly suggested.
thanks.
JM.

It sounds like the prohibitory sign is indicating a kernel panic at start up:
http://support.apple.com/kb/TS1892
Here is another link that may help in troubleshooting:
http://www.thexlab.com/faqs/kernelpanics.html
Good luck!

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Do Not Enter Sign on Macbook Pro. 2010 13 inch

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