Strange orange lines after installation

[WeirdOrange]

I have been using ubuntu for a while on my laptop which successfully upgraded to 12.04LTS but when I installed Ubuntu 12.04 on my desktop and booted it the screen was covered in orange lines of different lengths.

[WeirdOrange]

My computer is a Custom built Sandy Bridge i7 with 8GB of RAM and an AMD Radeon HD6670. I have a USB V.2.0 Motherboard and my screen is a Samsung SyncMaster XL2370 which does not require the driver.

[2F4U]

Which graphics driver are you using, the open source or proprietary ATI driver? Do you see the same stripes when you run a liveCD on the desktop?

[WeirdOrange]

I use AMD Catalyst Control Centre (not sure about the actual driver itself) version 2012.0611.1251.21046 It is not the open source driver though.
I used the Windows installer for Ubuntu. I will attempt the liveCD and will reply when I have tried it.

[WeirdOrange]

OK... CD didn't work at all, I figured out that it was the driver, I installed Ubuntu on my dad's older computer. It had a graphical issue that was a black screen, it was caused by the driver and the nVidia graphics card had a 2009 driver. My ATI driver is NOT open source so I will check for the open source driver and see if it helps.

Edit: Could anyone provide the link to the open source driver? All the instructions only work on Ubuntu which I can hardly use let alone opening an application.