Error 'ExecutePackageComplete returned event status code: [0x80070643]' when trying install Toad for Oracle v13.0 (4238799)

When trying to install Toad for Oracle 13, either from the .exe or .msi installer, the following error appears:

'ExecutePackageComplete returned event status code: [0x80070643].
ToadForOracle_13.0.0.80_x64_En.msi returned error code: [0x80070643], Package returned error message: [Failed to configure per-machine MSI package.].'

RESOLUTION 1:
Please try restarting the PC where the error occurs, and as the first action once it starts up, run the Toad installer by right-clicking it and choosing 'Run as Administrator'

RESOLUTION 2:
Try installing silently in an elevated command line

1. Create a folder C:\Silent
2. Download the MSI zip file from https://support.quest.com/toad-for-oracle/download-new-releases
3. Extract the MSI files
6. Copy the relevant installer file to the C:\Silent folder
7. Go to Start | type 'cmd' | Right Click the 'cmd' icon | Run as Administrator
8. CD C:\Silent
9. Type msiexec /i "<Toadproductname>.msi" /qn /l*V "install.log"

e.g.
msiexec /i "ToadForOracle_13.0.0.80_x64_En.msi" /qn /l*V "install.log"

The product should install silently with no GUI. Give it a few minutes to install