On one of my machines (Windows 10 Pro) with TeamViewer 14.1.9025 none of 3 update methods work:
The only way of getting this machine updated is downloading the latest TeamViewer installer and installing that over the old version.
This machine had this problem for a longer time already so it isn't something specifically with version 14.1.9025 - the same problem existed in all previous versions.
Any ideas what I can try? Thanks!