The current SKU is invalid. When adding second node to SQL 2008 failover Cluster

Resolution
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There will be an ini file in setup. Z\SQLsetup\x86 folder >> DefaultSetup.ini
which contains following entry like

;SQLSERVER2008 Configuration File
[SQLSERVER2008]
PID=”*****-*****-*****-*****-*****”

Just comment out the PID key by semi collen (;) and then copy the key and put that key during the installation. It should be like this

;SQLSERVER2008 Configuration File
[SQLSERVER2008]
;PID=”*****-*****-*****-*****-*****”

copy the PID key *****-*****-*****-*****-***** and paste during the installation.