Computer 'pauses' at startup

Hello. I recently reinstalled the macbook installation CD on my macbook due to a problem I was having. It fixed my problem, so I installed some updates from software update. [For some reason though, the most recent version of Mac OS X wouldn't intall]. I restarted my computer and now it wont startup. The pinwheel rotates continously and the apple logo stays. Also, there is no chime before the apple appears. I tried to use Quick Assist to fix this but it did not help. And I do not have room to reinstall my macbook installation CD.
Please help!
Thank you.

Hi,
I'm not sure of : "I do not have room to reinstall my macbook installation CD" from your post. Do you mean the Hard Drive is not showing up as an option?
IF the HD is not showing up, your HD might be failed, you must visit apple (hope you still in warranty or have apple care with you), and apple will replace the HD with the new one.
Good Luck.

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Computer 'pauses' at startup

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