You may need to try the following in a command prompt as administrator. I suspect the path will change based on the version you're using.
1) Use the "cd" command to navigate to the location of your OraOLEDB.dll
2) Use the following command based on if you're using an x86 or x64 version or Oracle:
64-bit Oracle: c:\Windows\system32\regsvr32.exe OraOLEDB.dll
32-bit Oracle: c:\Windows\SysWOW64\regsvr32.exe OraOLEDB.dll
Alternatively, you can add the \bin folder of where you installed the Oracle client into your system PATH.
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Ami Barrett
Sr Product Consultant
Blue Prism
Plano, TX
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