http://msutic.blogspot.com/2009/08/how-to-instal-oracle-client-11g-on.html
Shortly after initiating installation of Oracle Client 11g (11.1.0.6.0) installation stopped on prerequisite checks with error:
Checking operating system requirements …
Expected result: One of 5.0,5.1,5.2,6.0
Actual Result: 6.1
Check complete. The overall result of this check is: Failed <<<< Problem: Oracle Database 11g is not certified on the current operating system. Recommendation: Make sure you are installing the software on the correct platform. ========================================================
To workaround this problem I've decided to edit refhost.xml file adding entry for Windows 7.
Location of this file on my system:
c:\unpacked_client_installation\win32_11gR1_client\client\stage\prereq\client\refhost.xml
This is excerpt from my newly edited refhost.xml file:
<OPERATING_SYSTEM>
<!--Microsoft Windows 2000-->
<VERSION VALUE="5.0"/>
<SERVICE_PACK VALUE="1"/>
</OPERATING_SYSTEM>
<OPERATING_SYSTEM>
<!--Microsoft Windows XP-->
<VERSION VALUE="5.1"/>
<SERVICE_PACK VALUE="1"/>
</OPERATING_SYSTEM>
<OPERATING_SYSTEM>
<!--Microsoft Windows 2003-->
<VERSION VALUE="5.2"/>
</OPERATING_SYSTEM>
<!--Microsoft Windows Vista-->
<OPERATING_SYSTEM>
<VERSION VALUE="6.0"/>
</OPERATING_SYSTEM>
<!--Microsoft Windows 7-->
<OPERATING_SYSTEM>
<VERSION VALUE="6.1"/>
</OPERATING_SYSTEM>
</CERTIFIED_SYSTEMS>
New lines are added at the end of this excerpt after . Notice version value=6.1.