Platform update QDB pre-installation check failing against 2008r2 sql cluster with default instance (NETIQKB73201)

The pre-installation check will fail when SQL 2008r2 is installed on a 2008 cluster with only a default instance.

Make sure SQL agent service is started & in automatic mode (manual is default), revert to manual after installation completes.
Invoke command prompt as ?Run as Administrator? and execute following command

NetIQCCSetup.exe /v"/l*v ?<Absolute path for msi log>" SKIPINSTALLATIONCHECK="1""

Example:
NetIQCCSetup.exe /v"/l*v "C:\CC_msi.log" SKIPINSTALLATIONCHECK="1""

This is due to the change in naming of the default instance within SQL. The Default instance is now named MSSQLServer however it accepts incoming requests as just the netbios name of the cluster and not servername/MSSQLServer.

You will see at the top of the preinstallation report that the server and instance are shown in this format.

Formerly known as NETIQKB73201