Use the Services Control Panel (Start > Administrative Tools > Services) to set the startup type to Automatic for the Themes ...

Use the Services Control Panel (Start > Administrative Tools > Services) to set the startup type to Automatic for the Themes service.

The Themes service is available by default on Windows Vista and Windows 7.  Themes can also be enabled on Windows Server 2008 or higher, but the service is not installed by default. To enable themes on Windows Server 2008 or higher, enable the Desktop Experience feature (Server Manager > Features > Add Features > Desktop Experience). Note that installing this feature will require restarting your computer.

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