MBA frozen at start-up

My MBA 2011 (latest update) froze at the apple icon after I installed Java 7 and Adobe Flash. The Java 7 was installed without an issue, but during updating Adobe Flash, it had asked me to quit Firefox to continue with the update. I delayed closing Firefox because I was still online. However, the screen frozed, and when I tried to restart, it just hangs on the Apple logo. The spinning wheel appears briefly after powering on, but then it disappears, and I'm left with the logo. The pointer appears and can be moved around, as well as the brightness control responds as well. I have booted into the safe mode no problem, and can navigate through it. But when I restart, it's the same hold-up. I have also booted into another start-up disk -> disk utility, and verified by Mac HD and there are no problems. I have tried NVRAM reset as well. If I leave the laptop on for a while, the Apple logo disappears and the arrow remains responsive.
I appreciate your assistance.

If you have more than one user account, these instructions must be carried out as an administrator.
Boot in safe mode and launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
Step 1
Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left. If you don't see that menu, select
View ▹ Show Log List
from the menu bar.
Enter "BOOT_TIME" (without the quotes) in the search box. Note the timestamps of those log messages, which refer to the times when the system was booted. Now clear the search box and scroll back in the log to the last boot time when you had the problem. Select the messages logged after the boot, during the time something abnormal was happening. Copy them to the Clipboard (command-C). Paste into a reply to this message (command-V).
For example, if the problem is a slow startup taking three minutes, post the messages timestamped within three minutes after the boot time, not before. Please include the BOOT_TIME message at the beginning of the log extract.
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. In most cases, a few dozen lines are more than enough.
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. Anonymize before posting.
Step 2
Still in Console, look under System Diagnostic Reports for crash or panic logs, and post the entire contents of the most recent one, if any. In the interest of privacy, I suggest you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if present (it may not be.) Please don’t post shutdownStall, spin, or hang logs — they're very long and not helpful.

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MBA frozen at start-up

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