Official downloads for Oracle 8i (released in 1999) are no longer available on the Oracle Technology Network, as the software was desupported over two decades ago. Furthermore, Oracle 8i was never certified for and is not natively compatible with Windows 10 64-bit.
Do not attempt to install Oracle 8i directly on your Windows 10 host. Instead, create a virtual time capsule. oracle 8i download for windows 10 64bit link
Run the Oracle 8i installer within that isolated legacy environment. RDBMS 8/8i/9i/10g Timeline (History) - Oracle Forums Official downloads for Oracle 8i (released in 1999)
If you’ve landed on this page searching for an “Oracle 8i download for Windows 10 64bit link”, you’re likely a student, a vintage database enthusiast, or a developer maintaining a legacy application. The short answer is: Oracle 8i (version 8.1.7) was never designed for Windows 10 64-bit. Instead, create a virtual time capsule
Official Sources: Oracle no longer provides 8i for public download. Licensed customers may occasionally request old media via My Oracle Support.