Select SAPEXE_ (latest patch number) _*.SAR and click on add to download basket from the bottom.
Now launch download manager from your system and down load the SAPEXE* and
Now extract the .SAR files from command prompt
Now check the number of files in G:\kernelupgrade (e.g. 115 files)
Stop all sap service and database service from
Double check the kernel patch level by executing SM51 -> Release Notes