OS is Win 8.1   64bit

I tried installing TWICE, two weeks apart. Both times same error messages popped up.

Two error messages come up:

A. RW 4.0 error message reads:

"Setup failed to run installation.
The remote procedure call failed."


B Installshield Wizard Error message reads:

Set up Engine stopped working

Problem signature:
  Problem Event Name:    APPCRASH
  Application Name:    IKernel.exe
  Application Version:    6.31.100.1221

I don't have problem with other  installations I downloaded from elsewhere within these two weeks - installshield wizard is giving no hassles.

Any idea what is preventing the installation? Thanks.