I just did a software update from Apple for my Mac Book Pro and it crashed severely. Now it will not boot-up. I had the fading down screen with a message saying to hold down the on Button to reboot but it will not, it starts up with the same massage.

It also comes up with some and more of the info below, whatever it means?
Panic CPU 0 <Panic>
Unable to find perform kext scan:
Debugger called <Panic>
Can’t perform kext scan:
SD process name corresponding to correct thread
MAC OS Version:
Not yet set.
What do I do, can anyone help me?
I also updated a Mac Mini and iMac with no problems.

unfortunatly i had no Backups.
You should make sure to correct that as soon as possible.  All computers, regardless of make and model, are ticking time bombs.  Hard drives can die at any time, leaving you with an inert chunk of metal that may still contain your data, but in a form that is totally inaccessible without paying thousands to a company that will disassemble the drive in a clean room and read what data they can off the platters.
I wonder why should that happen. It was a simple update. Why should an update ruins all my works and my computer...
It is not the update itself, but the fact that you had corruption in your hard drive's data structures, and writing the thousands of files required by the updater worsened that corruption, damaging the system in the process.  These problems can be avoided by repairing your hard drive with Disk Utility prior to installing any system update.  Most likely, Disk Utility won't find anything to fix, but when it does, you'll be glad you did it before installing the update!

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