Boot screen

A boot screen is often displayed by an operating system or other software to visually indicate its initial loading process. Depending on the software, the screen may include version information, a definite or indefinite progress indicator, or status messages. Many boot screens also feature the branding of the loaded software, its developer and/or distributor.

Windows 1.0 and 2.x
The boot screen was first introduced in Windows 1.0 Beta Release. In Windows 1.04, the boot screen was updated with a new logo, which was used by Microsoft until 2012.