HT1222 Non responsive operating system after this most recent update?

Question

About 5 days ago, my computer randomly decided to shut off without warning. The next day, Safari caused my computer to crash if I had it open for more than 30 seconds. That night, the operating system could hardly take a terminal command without acting like it had 1MHz clock speed.
I have freshly installed Mavericks again on my MacBook 5,1... After reloading a time machine storage of a month old, exactly the same thing happened. Everything is colossaly slow.
I am now on my second fresh install of Mavericks, and I dare not reload my time machine backup... No problems as of yet.
Ill come back to this post after I install the HT1222 update again, and reply if I see the same problems again.
Not impressed with the update.

Answer 1

Welcome to Apple Discussions!
When I press the power button, the computer simply beeps three times and does nothing else. I can't get the computer to start up using a system disk either.
That says your logicboard or RAM went bad. It has nothing to do with the security update.
Just a bad coincidence. It is important to identify your Mac model more clearly in your profile:
http://docs.info.apple.com/article.html?artnum=88248
That way we can identify which of these articles apply to you:
http://www.info.apple.com/kbnum/n58183
http://docs.info.apple.com/article.html?artnum=58442
http://docs.info.apple.com/article.html?artnum=303083
Please start a new topic thread so someone can help isolate your problem.
http://discussions.apple.com/forum.jspa?forumID=1037&start=0
First off, you'll get a wider audience who may be able to solve your problem. Secondly, responses to you won't confuse the original poster with solutions that don't apply to them. And thirdly, you'll know for certain whether or not a response applies to you.