SharePoint 2016 never updated

Question

I'm mostly working on Sharepoint 'frontend' - never on the admin part of updates ect, so please bear with me. I have a new client that have SharePoint 2016 (on-prem) installed, running on a SQL 2014 - all on one server. Their SharePoint site has never been updated since the installation. :-( From what I could see, the windows updates have been running and installed until this morning (9 Aug 2018), but no other updates than those that came with Windows. I don't know if SP updates also come through windows, but their SharePoint give funny errors like when opening a sub site settings - it says 'File not found'. I had a look in the Central Admin and saw some updates did not run. See attached image.

So I was thinking of doing an update to the latest version, hopefully this will fix the problems.

I have a few questions and need some guidelines please: 1. Whereto do I go from here regarding updates - do I need to install all updates one by one since the last update, or can I only update the latest one. 2. How do I run the updates, should I download them and if so, is there a step by step guide which I can use?

I would really like to help this client get the SharePoint fixed, but need help.

Answer 1

1. You need to install latest cu, it will contains all previous updates.
2. You have to download it from MSFT site, their will be 2 files (one start with sts n 2nd with wss)
3. You need to install both files on all sharepoint servers in farm
4. Now you have to run configuration wizard on all servers one by one.
5. Test the sharepoint

Here you can get info about latest cu.August 2017 CU for SharePoint Server 2016 is available for download

One thing I recommend, always test the cu in lower farm n then proceed with production.also this activity will cause interruption so you have to do it in schedule manners.