If you must use Oracle 8i for legacy application support or research, you cannot install it directly. Instead, you must use a :
Finding a direct download link for for Windows 10 64-bit is impossible because Oracle 8i was never designed or certified for 64-bit modern operating systems like Windows 10 . Released in the late 1990s, Oracle 8i (specifically version 8.1.7) reached its end-of-life status over two decades ago and was primarily built for 32-bit environments like Windows NT and 2000. The Problem: Compatibility and Availability oracle 8i download for windows 10 64bit link
Install oracle 8i on windows 10 OS (x64) - Toad World® Forums If you must use Oracle 8i for legacy
Oracle has removed Oracle 8i from its official download servers . It is no longer available for public retrieval through standard channels. you cannot install it directly. Instead