Hi Lego, I need your knowledge - if you are willing to share with me I heard WinKit is able to set custom theme for default profile. I am trying to do this manually and keep failing for past ~20 hours or so. Can you possibly tell me how does WinKit do it please? I have my own .theme file (basically just Aero with no wallpaper and no sounds, more or less) which I want to set active so the user doesn't need to change anything, it must be set on first boot. I install graphic drivers during setup too, specifically during setupcomplete.cmd phase. The main problem seems to be the inability to set active theme. Stuff I tried: <Themes> <DefaultThemesOff>true</DefaultThemesOff> <ThemeName>AeroNoBackground</ThemeName> </Themes> in the answer file adding reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Themes /v InstallTheme /t REG_SZ /d "%SystemRoot%\Resources\Themes\AeroNoBackGround.theme" /f into registry - I heard credit goes to you - I tried this both with firstlogoncommands and in setupcomplete.cmd before the drivers gets installed So far no luck. Since you apparently managed to get it to work, can you help me out please?