I uninstalled all the Komplete 9 programs that did get installed in the first attempts
Rebooted
Transferred  the contents of all 11 Komplete 9 Disks to the Desktop and install from there.
 
 
 Question is really about NI Komplete 9 and Win8.1 64bit.
I've got the combination running on Win 7 32 bit machine but can't get Komplete9 to correctly on my win 8.1 64 bit machine.
Just wondering if anyone get it installed?
Thanks,
Fred
 

Yes.  I have not encountered any issues.  
 
I did however, originally install into Win 8 64 bit.  I did the Win 8.1 update in place.

I have NI Komplete Ultimate 9 running on Win 8.1 x64. All of the instruments work in standalone mode and plugins all work too. Using sonar x3c.
There were about 20 or so updates recently so you might want to run NI service centre and check you're running the latest versions of each product.

Waiting on my BF Version to arrive....I'm on Win 8.1
so this will be a good thread to watch!

Here's the problem I've encountered (this was sent to NI Tech support and I'm hoping they can answer-we'll see)
 
I successfully loaded Komplete 9 upgrade to my Win 7 32 bit desktop but have been unable to load it onto my Win 8.1 64 bit laptop.
I've tried at least 3 time to do this. Each time uninstalling all Komplete 9  components and rebooting
Here's a typical install
Disk 1 (Install) and the Disk 2 Battery Library install OK
But somewhere within the next disks it gives me the following messages. Its happened at disk E, Disk D, and Disk B
Error message says  "Unable to load plug-in library Please rebuild your project..."
I click OK (the only option)
Then is says "action skipped"
Then a dialog box open titles "Disk not found" with the message Please insert Komplete 9"
Notice it doesn't ask for any particular disk. 
It then refuses to accept any disk and my only option is to cancel
 The NI service enter shows all individual components of Komplete 9 are there BUT gives no indication that Komplete 9 is installed On my win7 32 desktop the only choice in the service center was Komplete 9 with no individual components shown.
 
QUESTION: What do I need to do to get this on my system from the CDs
OR Can I transfer the Libraries from the disk on my desktop (where Komplete9 IS installed and working and somehow link and  authorize them on the Laptop. OBTW all directories are the same on both (except of course for the 64/32 bit vsts installs.
Thanks,
Fred
 

This may or may not help:
http://www.native-instruments.com/forum/showthread.php?122639-absynth-5-wont-install