Install fail on Windows 8.1 (64-bit)

[cygnal]

Hi,

I cannot seem to Google this.

VirtualBox (at this time, 5.0.10) refuses to install on Windows 8.1.

Upgraded from Windows 8 through MS store. Previously had VB 4.xx installed and working.

De-installed the previous version, but kept the VMs configurations and disks.

The setup stops clean after typing in Admin password ("Installation was interrupted...").