On 26 of July I was enforced by Windows 10 to update my OS (to version 1903) and few other updates were queued to be installed, also SQL
Server 2016 Service Pack 1 GDR update (KB4505219).
It was major Windows update which took a long time so I left it for the night to be updated.
In the morning I had a very unpleasant surprise. Windows was updated indeed to new version, SQL server update failed, and my data was gone. I keep all applications
on C:\ partition, but some updates wiped my D:\ partition where was no files related to any MS service, I had only one database files in there which could be somehow correlated.
My suspicion that SQL Server update may be responsible for that data wipe comes from scanning D:\ partition with couple of simple programs
to files restore. They all show that last files which appear on that partition are SQL Server files which have should never been there. The full list in the file
https://1drv.ms/t/s!Alry_rVH97JyngkEnk241F92STmy?e=vdS6Qx
I talked to first line MS support and of course they stated that this is impossible to happen during Windows update. But there are many
comments on the Internet with similar problems of losing data after Windows update to version 1903. But no track with problems related to SQL Server updates. I will leave it here as a warning.
Unfortunately, I received a lesson straight from MS to start doing full backups. Restoring lost files from wiped partition would cost me
hundreds of dollars, so I just have to deal with losing them.
It just would be nice if all updates enforced by OS and other MS applications would be safe and tested more carefully before release.