SharePoint 2013 Cumulative Update Error - The expected version of the product was not found on the system
I got this error while I was trying to install the Cumulative Updates August 2013. The reason for this error is that the baseline for all updates is the first Cumulative Update in March. I checked my build version of the farm and found out that I've installed the RTM version. If this doesn't solve your problem you can try to start the ubersrv2013-kbxxxxxx-fullfile-x64-glb.exe with the parameter PACKAGE.BYPASS.DETECTION.CHECK=1 like: ubersrv2013-kbxxxxxx-fullfile-x64-glb.exe PACKAGE.BYPASS.DETECTION.CHECK=1 ( Do not forget to start the command as farm administrator ) This bypassed all checks so that you can force the installation. Ressources : SharePoint 2013 Build Numbers and CU's