The Search Companion installation may be damaged, as a needed file is missing. Normal search operations will no longer work.
Microsoft had issued a hot fix (a special update) to fix this issue, but removed access to the download in August, 2012 (Microsoft Hotfix Q319949).
Microsoft has identified a problem with the OSes listed below that require updating to the current service pack to fix this issue:
SP1 or later will correct the issue.
Check out what others say about this issue and review or add your own comments and solutions!