Re-Apply Windows Theme to existing Users

The windows theme can be managed with GPO , but this setting only takes effect if the user has no profile.

This is because the theme is set using an active setup execution, once execeuted once its tagged and it not run again.

If we want to set a theme for existing users who already have profiles we need to run the code contained in the RUN key.

%SystemRoot%\system32\regsvr32.exe /s /n /i:/UserInstall %SystemRoot%\system32\themeui.dll

This will then adhere to the theme settting within group policy.