Random horizontal bars in Mavericks... PLEASE HELP!!!

Question

The random horizontal bars in Mavericks that are shown in the link seem to occur when computer is under abnormal stress. It even happens at times when I just started up Safari or randomly flung the screen over to the widgets panel for the first time in days. The problem only in Mavericks, it didn't happen on Mountain Lion or Lion. The bars even show up irregularly on the shadows of certain program windows, the shadow that the window box is projecting onto the background. It's almost like the programs can't find the icon images that go with their parts or the images they find are corrupt. If so, what do I do about this?
Here are my stats:
Mac: Mid 2010, 15-inch
processor: 2.66 GHz Intel Core i7
Memory: 4 GB 1067 MHz DDR3
Graphics: Intel HD Graphics 288 MB
Software: OS X 10.9.1 (13B42)
Here's the image if you can't see what's below
Thank You very much for checking this out!

Answer 1

Hey there,
First off, go ahead and try these steps:
do an SMC and PRAM reset
      - turn the computer off, make sure the charger is connected. Hold down the shift, control, and option on the left hand side of the keyboard, while all three are pressed, also press the power button. The computer should not come on
      - after that, let go of everything and then do this. Hold down the command, option, R, and P keys and then press the power button, now keep a hold of the command, option, P, and R until you hear the start up chime twice
- after that, if it still persists, check for an EFI firmware update, which you can find you computer in this list here:
http://support.apple.com/kb/ht1237
- if that doesnt work, you may have to do a reinstall of the OS X and to do that, do this:
      - turn the computer off, then hold down the Command + R keys and then turn it back on
      - keep holding down the command + R until you see a screen that asks for your language.
     - choose English and the arrow in the bottom
     - Then after that, the second option should say "reinstall Mac OS X" choose that option and go through the steps to reinstall. After that, it should be ok.
- if all else fails, you may have to go to an Apple store or an Apple Authorized Service Provider and see if they can run some diagnostics, maybe the onboard graphics are causing some issues.