Having problems with RAD Studio ‪#‎XE7‬ and ‪#‎XE8‬ installation?

Having problems with RAD Studio ‪#‎XE7‬ and ‪#‎XE8‬ installation?
Short and useful solution awaits you here 
http://goo.gl/qEykCp
‪#‎Delphi‬
http://goo.gl/qEykCp