Display adapter: Radeon HD5670
I have two monitors. Everything was fine, then I installed the Catalyst upgrade and I cannot access the second monitor. In the Catalyst Control Center I stumbled on an option to disable Crossfire, which I did and the second monitor appeared, but after rebooting the computer it went away again and I can't find where I disabled Crossfire.
Also, Device Manager normally shows two copies of the HD 5670 but now only shows one.
Please help me get my second monitor back!