Hi,
What is the update they you are trying to peruse?
Try this:
Windows Upgrade
1) Download this tool:
https://go.microsoft.com/fwlink/?LinkId=691209
2) Once downloaded, run it.
You should see this:
3) When asked to accept licence terms, read the terms then if you agree, click accept

4) When asked what you want to do, select Upgrade this PC now

5) Let the process download windows 10, this will take some time

6) Once that is done, it will verify the update automatically, then it will move onto checking updates automatically:

7) When it is completed, save any work, and ensure your data is backed up in case anything goes wrong.
8) Check the options are correct and select Install.

9) Let windows 10 download and once windows has loaded again, you are good to go!
Cheers!