Oracle 8i runs natively on operating systems from its era. You need to obtain an installation ISO for one of the following:
Direct official download links for Oracle 8i (8.1.7) for Windows 10 64-bit do not exist oracle 8i download for windows 10 64bit link
Downloading Oracle 8i for a modern Windows 10 64-bit environment is not officially supported and is technically complex, as the software was desupported long before Windows 10 existed. There is for Oracle 8i on the Oracle Software Download center or Oracle Software Delivery Cloud , which typically only host versions back to 10g or 11g. Key Download and Compatibility Information Oracle 8i runs natively on operating systems from its era