I’m having the same problem as reported here (PVF not installing) when trying to install pgiws64-1310.exe, downloaded today, on my Windows 7 computer. I see the same error message from the installer both before and after installing the Windows 8 SDK (well, actually I installed the Windows 8.1 SDK, since that its the current version now).
Is there a way to resolve this without waiting for a new release?