From bug 43259:
After unpacking, the next interaction is to ask for the user's name and
organisation. This question is asked even when upgrading from an older
version, for which this question will have previously been answered. Why does
the installer not read the configuration of the older version to obtain this
User name and Company name are used only for RegOwner and RegCompany keys in registry under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\[some GUID]\InstallProperties. They are not used in LibreOffice elsewhere, e.g. in Tools - Options - LibreOffice - User data, that is different. I wonder, if we need to prompt users for these, or would it be enough to take values from HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\RegisteredOwner and HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\RegisteredOrganization.
Andras Timar committed a patch related to this issue.
It has been pushed to "master":
fdo#46559 bypass CustomerInformation dialog in Windows installer