If you're running Windows 2012 with an 8.02 CMS site you may be seeing issues with Indexing Search.
As detailed in the below Microsoft post, the Indexing Service is no longer used after Windows XP and is completely unavailable for Windows 8.
The Indexing Service is not present on Windows 2012 so search that uses it will not function at all. The only option at this point would be to upgrade the CMS to at least version 8.5 and start using Microsoft Search Server.
For more information, please see the following post: