MacBook Lion OSX Reinstallation

I undertook the deinstallation/reinstallation process of my Mac Lion on my Macbook Pro 2009. The system started to download all need components from the internet and after it was complete, it automatically restarted itself and here becomes the problem; after restart it opens up to blank white page showing the sign of being working and that’s it. I left it for around 12 hours and nothing happened. I searched the internet a bit and I was advised to click on command and R and then turn on the device. I did so and the installation wizard popped up but it came up with an error  message. I am stuck there now, and I cannot go any further.
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F_A_H_DAsked:
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Sigurdur ArmannssonConnect With a Mentor DesignerCommented:
Did you use the DiskUtility to check the disk first?
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strungCommented:
So what is the error message, pray tell?
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Kash2nd Line EngineerCommented:
what happens if you reboot with SHIFT key held down. Safe mode that it?
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F_A_H_DAuthor Commented:
rr
ERROR


please help
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F_A_H_DAuthor Commented:
Yes. When I click on it, it asks me to unlock it and when I put the password to unlock it, it disappears.
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