MacBook Pro froze during software update, now it's stuck at gray screen

My MacBook Pro was running a little slow today so I did a Disk Utility repair and that went fine then I did a software update (OS X, Java and remote desktop) but it froze during the last ten percent of the update install and now when I boot up it won't get past the gray apple screen. I tried to restore Lion but since I bought this used my Apple ID wasn't used to purchase Lion so I can't do a restore.
I've tried to safe boot and boot from a CD but no go.
I also tried the short and long Apple hardware tests and those found no problems

In case anyone else needs an answer to this, I called in to Apple. Tech support said to power it off and let it reboot itself. I had to go back into updates and tell it to finish the install (restart computer, was the only step remaining) and it worked fine. It took longer because it had gotten hung up during the previous restart. ( Just to clarify, I was stuck on the grey screen after the restart step of the install.)

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If there are runs of repeated messages, post only one example of each. Don’t post many repetitions of the same message.
When posting a log extract, be selective. Don't post more than is requested.
Please do not indiscriminately dump thousands of lines from the log into this discussion.
Important: Some private information, such as your name, may appear in the log. Edit it out by search-and-replace in a text editor before posting.

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MingusBass,
Welcome to the Apple Discussions!
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Step 2
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Step 4
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Step 5
Launch Disk Utility in Recovery mode (see Step 1.) Select your startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
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Macbook pro froze during partition. after force shut down it, a part of hard drive lost

2011 15' Macbook Pro with Mountain Lion.
I was trying to use Bootcamp to install windows. Somehow I got confused and used disk utility to partition my hard drive and get 100gb for windows (before that it was 500 gb with 260gb free). And after 10 minutes the computer froze and I could do nothing but force shut down it. Rebooted and disk utility shows that it has 160 gb free space now. I repaired disk and permissions but none of them worked.
How can I get my 100 gb back? Help pls
Thanks

Check this link and see it any info will help.
http://pondini.org/OSX/DU.html
edit: added this discussion.
https://discussions.apple.com/message/19213226#19213226

MacBook Pro froze during software update, now it's stuck at gray screen

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