fix r5apex.exe win 8.1

FOR THOSE USING WINDOWS 8.1 (this worked for me after trying for days to fix it) - 

First of all you need to turn off automatic windows updates and restart your computer. (If you want to download the updates through windows you need to check for updates through the update manager on windows after changing the update settings to off and re-starting your pc. 

KB3173424 https://support.microsoft.com/en-us/kb/3173424

KB3172614 https://support.microsoft.com/en-us/kb/3172614

You MUST download the pre-requisites and restart your pc after you do it. This may require multiple restarts as it did for me because the updates kept not showing up at all. I tried doing it through the "windows automatic update" process and the updates did not even show up until I downloaded the pre-requisites manually and restarted my computer once for every time I manually downloaded a different pre-requisite update.