When attempting to install the USS component, when selecting the Liferay ZIP file, the install returns an error: "Checksum validation failed. Upload a valid Liferay ZIP file".
The Liferay file downloaded was: 'liferay-portal-tomcat-6.2-ce-ga6-20160112152609836.zip'
The incorrect Liferay ZIP file was downloaded and/or the ZIP file is corrupt
Download correct Liferat ZIP file from: https://www.liferay.com/downloads/liferay-portal/available-releases
Scroll down to the 'Other Versions section' and select 'Liferay Portal 6.1 Community Edition GA3 -> Bundled with Tomcat' and click the download icon.
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The correct Liferay ZIP file is 222 MB.