"Failed to run a required program (Blizzard setup). Wait one minute and try again and if that doesn't work please restart your computer and try again.
Please click the link below for more information or contact Customer Support if the problem persists."
Then there's a link that with the text in the thread title, which leads to http://eu.battle.net/en/ .
I've tried again and restarted my computer many times. Anyone know what to do next?