We have a SQL Server:
Microsoft SQL Server 2017 (RTM-CU14-GDR) (KB4494352) - 14.0.3103.1 (X64) Mar 22 2019 22:33:11 Enterprise Edition (64-bit) on Windows Server 2016 Datacenter 10.0 (Build 14393: ) (Hypervisor)
Tried to install "Cumulative Update Package 18 for SQL Server 2017 - KB4527377" https://www.microsoft.com/en-us/download/details.aspx?id=56128
Setup was doing something for 15 min, installing and updating files, stopping / starting services, it looked like its going to succeed, but in the end it showed this:
Use the following information to resolve the error, and then try the setup process again.
Feature failure reason:
An error occurred during the setup process of the feature.
Error installing SQL Server Database Engine Services Instance Features
The User Log directory in the registry is not valid.
Verify DefaultLog key under the instance hive points to a valid directory.
Error code: 0x851A0044 Visit https://go.microsoft.com/fwlink?LinkId=20476&ProdName=Microsoft+SQL+Server&EvtSrc=setup.rll&EvtID=50000&ProdVer=14.0.3257.3&EvtType=0xD8FB5EBA%400x97A656BB%401306%4068&EvtType=0xD8FB5EBA%400x97A656BB%401306%4068 to get help on troubleshooting.
What's preventing CU18 from installing ?