That's impossible, because I installed win8.1 on my PC 2 weeks ago and it has only had 1 version of java installed.
http://prntscr.com/2bbnjn
http://prntscr.com/2bbpc4
As you can see, JRE 7 x64, Installed on Thursday... I haven't downloaded or installed any other version, And windows 8 doesn't...