Hi, I have Windows 7 pro with office 2013. Every morning my search index gets rebuilt by itself and on the start menu icons, the list of files used by each application gets cleared (reset). I don't care much about the start menu icons, but it takes an hour or two every day to reindex.
Rebuilding the search index (also removing some folders from indexing).
Uninstalling windows search and installing it again (with and without deleting the c:\programdata\search folder).