https://bugs.winehq.org/show_bug.cgi?id=40761
--- Comment #3 from Sebastian Lackner sebastian@fds-team.de --- (In reply to Qwerty Chouskie from comment #2)
Warnings:
Setup may not run properly, because the Windows Modules Installer Service is not available on this computer.
Done just as you said.
This message is not directly related to wusa.exe. The installer checks for Windows specific services. Wine does currently not make any effort to reproduce them exactly as on Windows. Technically this can be seen as a small bug, but in this case its a harmless one, and I'm not sure if it makes much sense to fix it.
When you click on proceed anyway, everything should work fine. By adding WINEDEBUG=+wusa you can also see that the .NET installer makes several calls to wusa.exe which are all successful:
--- snip --- [...] trace:wusa:install_assembly Installation of L"NetFx-FW_NETFXPERF_DLL" finished trace:wusa:install_assembly Installing assembly L"Microsoft-Windows-NetFx4-Shared-Deployment-NetFx20" trace:wusa:install_assembly Installation of L"Microsoft-Windows-NetFx4-Shared-Deployment-NetFx20" finished trace:wusa:install_assembly Installing assembly L"Microsoft-Windows-NetFx4-Shared-Deployment" trace:wusa:install_assembly Installation of L"Microsoft-Windows-NetFx4-Shared-Deployment" finished trace:wusa:install_assembly Installing assembly L"Package_for_KB958488" trace:wusa:install_assembly Installation of L"Package_for_KB958488" finished trace:wusa:install_msu Installation finished --- snip ---