Toad attempts to install Microsoft .NET 4.7.1 as a pre-requisite for the products. According to the registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full
The release version is 461308.
According to the following Microsoft Document, this means version 4.7.1 is already installed. However, it's not possible to continue with the installation with a failed prerequisite check.
