This will be the best link ref "RP only downloads to 92% then disappears" Installation fails or freezes
Its the most compehensive advice from them.......but still didn't work for me but I think you should give it a try as it may work for you.
As stated in my previous reporting of this fault......every day for approx 1week I went to the RP page, 2-3 times a day and tried downloading RP......then out of the blue, about a week later.....it installed correctly !!!! I had done nothing to my computer to affect the download over that week of trying !
Would also strongly suggest you go to Facebook.....RealPlayer.....where you can Post your problem in front of the "whole world", and usually get some form of advice, within 12 hrs, less weekends, and just keep returning to them every time you have completed their recomendations to fix the fault and it still exists.....go back to them for more advice.....don't give up !!