We have trouble with the SearchIndexer on Windows 2012 R2. Microsoft suggests do uninstall the feature and reinstall it.
Where can I do that in Windows Server 2012? Can't find the feature in the feature list.
Server Manager, click on
Add roles and features click next until you get to
Features and then uncheck
Windows Search Service and complete the wizard.
You might be best of sharing the issue you are having as well, is it a performance issue due to this service?