Screen Tearing/Pixelated into White Pixelated Startup Screen?

Hello,
Two days ago my screen started to really show some weird things, my screen would begin to tear/pixelate and show weird stuff, this happened more often when i scrolled the page. Here are some screenshots to show you what i mean:
Screen 1: http://oi46.tinypic.com/10ckhmh.jpg
Screen 2: http://oi48.tinypic.com/15bw3k.jpg
Note: This was not a browser issue, this happened all over my screen no matter what application i had open at the time.
So after this i tried to lower my screen resolution, in a wild hope that it would fix this problem, so i lowered my resolution from 2560 x 1440 to 1920 x 1440
When this happened my screen got white with a few black dots on it, i could move my mouse but nothing else, when i clicked somewhere with my mouse nothing happened, i could just move it around the white pixelated screen.
So i shut down my computer with the button, it was the only way i could do it, and i started it again, now my computer would boot up in this white pixelated screen and there is absolutely nothing i can do, i can't take any action or open any program or whatsoever.. Here's a picture of what i get:
Screen: http://oi49.tinypic.com/34q1vkl.jpg
So after this happened i tried booting into safe mode and safe mode works fine, no screen problem whatsoever, i tried looking for fixes to this problem and so far:
Things i've tried that did not work so far:
- Resetting PRAM (Command+Alt+P+R when booting)
- Taking the power out of my mac and holding the power button for 10+ seconds
- Hardware test (No problems were found)
- Deleting the file " /Users/<yourname>/Library/Preferences/ByHost/com.apple.windowserver.XXXXX.plist "
So any help would be greatly appreciated, i am at a lost here currently..
Thanks in advance!

UPDATE
I managed to solve my start up problem by deleting the file on my iMac HD instead of the /User/Myname Library. I am talking about this Library/Preferences/com.apple.windowserver.plist"
So i can boot my computer into normal mode again so that's fine, however the first problem still persists
Screen 1: http://oi46.tinypic.com/10ckhmh.jpg
Screen 2: http://oi48.tinypic.com/15bw3k.jpg
And it seems like its gotten worse when i open big programs like Ableton (Music Creation) or Adobe Photoshop. So any advice here would be greatly appreciated

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Screen Tearing/Pixelated into White Pixelated Startup Screen?

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