Tried to update graphics card driver, now opengl is broken

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I have a Radeon HD 5870, windows 7 64bit. I have been experiencing a crash in the game Minecraft when I play with the 'fancy' graphics setting. I wanted to try to fix this, and someone suggested I update my graphics card driver.

I went to the site for downloading Radeon standalone drivers and downloaded the installer "11-6_vista64_win7_64_dd.exe" and ran the installer. It blue-screened halfway through, and my computer rebooted.
The display driver was borked so I tried downloading the full Catalyst installer next "11-6_vista64_win7_64_dd_ccc_ocl.exe", and ran that exe. It extracted to my C drive but never continued the installation. SO I navigated to the folder on C that it had extracted to and tried running "Setup.exe" there.

I got this Error: "C:\ATI\Support\11-6_vista64_win7_64_dd_ccc_ocl\Setup.exe has failed to start because its side-by-side configuration is incorrect."

So then I followed the instructions to completely remove the ATI drivers, and restarted, but the Setup.exe in the exe installer still didn't run, still gave the same "side-by-side" configuration error.

I emailed AMD's tech support, they just said "use the old drivers, maybe there will be a new driver next week" (REAL helpful) so I dug out my old graphics card instal cd and ran the old installer. Which worked EXCEPT now when I try to run Minecraft it says it can't "find an Opengl accelerated card" or something.

So reverting to the old driver works except for Opengl which I need to play Minecraft which was the whole point of running the updater in the first place.

TL;DR: So basically I tried to update my driver and it completely broke Opengl.

Any ideas on what I can do to get OpenGL working again?
I tried titaniumgl.tk, it mangled Minecrafts graphics into garbage, so that doesn't work.

I can't even try to run the ATI installer again because it always says "side-by-side configuration" error.

Any advice on what I can do?
 

My Computer My Computer

At a glance

windows 7 64bitATI RadeonHD5870
OS
windows 7 64bit
Graphics Card(s)
ATI RadeonHD5870
You can try removing the drivers by booting up in safe mode and running Driver Sweeper to remove the AMD graphics drivers.
 

My Computer My Computer

At a glance

Windows 7 Ultimate x64Intel i7-860Corsair Dominator 1600Mhz, 8-8-8-24 1.65v 2x2GBATI Radeon 5770 HD
Computer Manufacturer/Model Number
Zen Productions
OS
Windows 7 Ultimate x64
CPU
Intel i7-860
Motherboard
Gigabyte GA-P55A-UD4P
Memory
Corsair Dominator 1600Mhz, 8-8-8-24 1.65v 2x2GB
Graphics Card(s)
ATI Radeon 5770 HD
Sound Card
Intel High Definition Sound
Monitor(s) Displays
Samsung P2570HD
Screen Resolution
1920x1080
Hard Drives
Western Digital Caviar Black 500gb
PSU
Corsair CMPSU-750HX 750W
Case
Antec p183
Cooling
Corsair H50 Water Cooler
Keyboard
Logitech G110
Mouse
Logitech MX Revolution
Internet Speed
768 mb/s
You can try removing the drivers by booting up in safe mode and running Driver Sweeper to remove the AMD graphics drivers.

Thank you, this worked! Although I am using 11.5 version of catalyst now but it works so I won't complain.
 

My Computer My Computer

At a glance

windows 7 64bitATI RadeonHD5870
OS
windows 7 64bit
Graphics Card(s)
ATI RadeonHD5870
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