remove: - microsoft .net framework 4 client profile - microsoft .net framework 4 extended - microsoft visual c++ 2010 x86 redistributable
restart your pc, download the DB installationwizard from here run it as administrator. after the wizard is done, run windows update. And install all updates for .net & c++ restart
download a clean install of DB run diablo3 and demonbuddy as administrator.
Did everything word for word and its still happening. Does not happen with Honorbuddy, and this recent build (302) is when it started happening for me.
You can lock this, I am an idiot sorry for wasting your time. I am too used to automatically seeing the trinity text pop up, just because it says flashing window dosn't mean its broke.. Mental note on that one.