We identified several challenges and limitations associated with running Oracle 8i on Windows 10 64-bit:
Official downloads for are no longer available from the Oracle Downloads page as this version has been desupported for over a decade. Furthermore, Oracle 8i was never certified for and is not compatible with Windows 10 64-bit; it was designed for much older platforms like Windows NT and Windows 2000. Compatibility Report oracle 8i download for windows 10 64bit link
First, let’s clear up the biggest misconception. When Oracle 8i was released (late 1990s), the standard was 32-bit architecture. The concept of a 64-bit Windows consumer operating system was nearly a decade away for most users. oracle 8i download for windows 10 64bit link