Stops at blue screen after the logo

after the logo and revolving gear wheel macbook turns into blank screen and nothing after that. Even I startup with os dvd the same thing is happening. At the same time it is working with windows 7 quite normal and very good. Anybody faced this problem and solved?

Satti,
I'm not sure if you realized it but you posted to an iMac forum not a Macbook forum. The correct forum is:
http://discussions.apple.com/category.jspa?categoryID=218
Regards,
Roger

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    i came back and there was no progress bar just the box so i quit the program and when i opened  mac mail the system just froze  i forced quit mail rebooted and blue screen death
    Now when free space is being cleaned is it the same as windows dose the utility write lots of 0 on the hard drive then rebbot its self to free the space
    basicly is my hard drive full of 00000  is this why im getting this message  because the process was interupted
    I need to know if i need outside help i bought the computer on line on  amazon uk  what dose one do next

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