I just want to update it to Microsoft SharePoint Enterprise Server 2013 (KB2965266) but I am getting error message as
The expected version of the product was not found on the system is there any solution for this
How can I fix this?
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When SP1 was first released it introduced issues that would not allow the installations of cumulative updates. If you installed KB2817429 you have the bad SP1 install.
Re-apply SP1 https://support.microsoft.com/en-us/kb/2880552
Once you have SP1 applied you can then re-attempt to apply CU.
If this is the SP1 (kb2880552) you already applied - you need to be be sure your upgrade successfully completed and you don't have servers, services, or databases that didn't upgrade. If you do - you need to address those before applying the CU.
If this is your first go around with updating SP - bear in mind there are two steps.
You can review this SPSE question for more info on updating SharePoint: Best practice to update SharePoint, how to?