Windows 95 build 456

Windows 95 build 456 is a post-beta 3 build of Windows 95.

Changes

 * This build re-introduces the mandatory upgrade requirement from build 420 in its Setup program. It is still possible to get past it by using the install disks of an earlier Windows version, though.
 * It introduces a new, abstract style for the billboards used during Setup. This style was used until build 480.