Sites like , OldVersion.com , or abandoned FTP mirrors sometimes host the Windows client. However, security risk is high – executables from unknown sources can contain malware. Always scan with modern antivirus and run in an isolated VM.
In most cases, you do not actually need the 8.1.7 client to connect to an 8.1.7 database. Oracle clients often have "backward compatibility." Oracle 9i or 10g Clients: download oracle client 8.1 7 windows
Are you looking to install this client on a , or are you trying to resolve a connection error with a legacy database? Sites like , OldVersion
Add these to your System Variables: