Turn off storage and display of search history

This policy setting prevents search queries from being stored in the registry. If you enable this policy setting search suggestions based on previous searches won’t appear in the search pane. Search suggestions provided by apps or by Windows based on local content will still appear. If you disable or do not configure this policy setting users will get search suggestions based on previous searches in the search pane.

Always use automatic language detection when indexing content and properties

This policy setting determines when Windows uses automatic language detection results and when it relies on indexing history. If you enable this policy setting Windows will always use automatic language detection to index (as it did in Windows 7). Using automatic language detection can increase memory usage. We recommend enabling this policy setting only on PCs where documents are stored in many languages. If you disable or do not configure this policy setting Windows will use automatic language detection only when it can determine the language of a document with high confidence.