You mean idxcntrs.ini? It's a data file for Windows Search, I have 2x stored copies only, WS is disabled here on W7x64.
C:\Windows\winsxs\amd64_windowssearchengine.resources_31bf3856ad364e35_7.0.7600.16385_en-us_145b9a152dcf317c\idxcntrs.ini
C:\Windows\winsxs\amd64_windowssearchengine_31bf3856ad364e35_7.0.7601.17514_none_d18028273214fa77\idxcntrs.ini