Okay now this is going to be relatively uncommon for most people, but often times in recent years PeopleSoft requires that we install 32 bit & 64 bit versions of the Oracle Client in order to make everything work as PeopleSoft has been transitioning from 32 bit Windows to 64 bit Windows.
So if you are flying through the installation of a new machine and you put the 32 bit version on without a problem and then try to install the 64 bit version you might run into an error. There are a few reasons this might happen but for me the problem was with a service called: “OracleRemExecService”. This service gets created during installation of 32 bit and 64 bit clients, but for some reason doesn’t remove itself cleanly in all situations. If you stop the service it should stop cleanly and then delete itself.
Continue with your other installation!