I just uninstalled my 10.4 to update to 10.10 since I read somewhere that 10.10 improves/fix the Call of Duty:Black Ops multiplayer stutter/lag.
Here's what I did first:
1. Uninstalled 10.4 by using the catalyst installer and choosing unsinstall instead.
3. Ran driver sweeper, then rebooted again.
4. Installed 10.10
6. Then I got an error saying that driver was not installed. (similar to what Ill post below)
I did steps 1-5 for 3 times but still got an error after the final reboot.
Finally I thought I'd try 10.11 so I uninstalled 10.10(where the driver was not installed, but the components I wanted to remove). I followed steps 1-3, but instead of 10.10 I installed 10.11. I still got the same error.
Here's the screen cap:
I installed some ATI updates(about two) when my Windows updated