Oracle 10.2.0.5 64-bit Client Install on Windows 7 / 2008 R2
In order to install the Oracle 10.2.0.5 64-bit client on Windows 2008 R2 (or Windows 2008 64-bit) you’ll need to execute setup using the following arguments:
setup.exe -ignoreSysprereqs -ignorePrereq
Note; This is CASE SENSITIVE
Thanks to ORACLE Note 1061272.1/aleys.net for this tip 😉