Windows NT 3.5 build 807 (Korean Beta)

Windows NT 3.5 build 807.1 (Korean Beta) is a Korean language build of Windows NT 3.5. It includes some Korean language applications, installs the Korean language pack, and has some changes in the setup.

Like in the Japanese version of Windows NT 3.5 build 756.1, there's an early concept of a timebomb in this build, where the boot message will change to a message to ask the user to obtain a retail copy of Windows NT 3.5. Despite that, the build is still usable.