! Download a program called 7zip or WinRar(7zip is my choice), once installed right click on the downloaded .rar file and choose 7zip, then click on extract files and it will unpack the compressed file
True, its very easy. Go to download dot com. Search winRar there. Download and install that software. Then go to that .rar file which you want to open, double click it, and it'll easily open in winRar.