nothing via google? https://www.google.at/?gws_rd=cr#output=search&sclient=psy-ab&q=An+instance+with+the+same+name+is+already+installed+on+this+computer.+To+proceed+with+SQL+Server+Setup%2C+provide+a+unique+instance+name.&oq=An+instance+with+the+same+name+is+already+installed+on+this+computer.+To+proceed+with+SQL+Server+Setup%2C+provide+a+unique+instance+name.&gs_l=hp.3...528.528.0.1156.1.1.0.0.0.0.0.0..0.0....1...1c.1.23.psy-ab..1.0.0.8i0u7jt5srY&pbx=1&bav=on.2,or.r_qf.&bvm=bv.50165853,d.Yms&fp=c234bbd9317c9ebd&biw=1280&bih=885

As you seem to be under stress, can you install the sql server using a named instance?